# Answers with Explanations for Time & Distance Practice Problems

Friends, here are the answers with explanations for our Time and Distance Practice Problems. Please check the practice problems from here and try to solve on your own before checking these solutions. Happy Reading.

1. Average Speed = 2XY / (X+Y)

=> (2 x 80 x 120) / (80 + 120)

= 96 kmph

2. Distance = 435 m,
Speed = 58 kmph = 58 x (5/18) mps

Time = Distance / Speed

=> 435 / ((58 x (5/18)) = (435 x 18) / (58 x 5) = 27 sec

3. Let the length of the second train be "X" metres.

Distance = 145 + X

Time = 27 sec

Speed = 69-35 = 34 kmph (Same direction)

=> 34 x (5/18) mps

145 + X = 34 x (5/18) x 27

=> X = 255 - 145 = 110

4. Let the actual speed be "S" kmph and time be "t" hours

So,

S.t = (5/8) . S . ((t+(12/60))

=> S = (1/3) x 60 = 20 minutes

5. Average speed = Total Distance / Total Time

=> (220+300) / ((8 hours + (300 km / 60 kmph)) = 520 km / (8+5 hours)

= 520 km / 13 hours = 40 kmph

6. Speed = 91 km / 7 hours = 13 kmph

Boat Speed - Current Speed (Upstream) = 13 kmph

= Boat Speed - 4 = 13

=> Boat Speed = 13+4 = 17 kmph

7. Let the speed of the stream be "X" kmph

Time to travel against stream = 12 / (8-X) hours

Time to travel along with the stream

= 20 / (8+X) hours

So, 12/(8-X) = 20 / (8+X)

=> 12 (8+X) = 20 (8-X)

=> X = 2 kmph

8. Let the distance between A and B be "X" km

So, (X/(12+2) + (X/(12+2)) = 12  => X = 70

9. Let the length of the bridge be "X" km

So, (290 + X) m = 90 x (5/18) mps x 27 sec

=> 290 + X = 675 m  => X=385 m

10. Let the original speed be "S" kmph and original time be "T" hours

Distance = S.T

So, S.T = (S-1) x (9/8) T

=> S = 9 kmph

11. Time taken to complete one round is 42/7 = 6 min

if the diameter increases 5 times, the circumference also increases 5 times

So, New time taken to complete one round is 5 x 6 = 30 minutes

12. Let the speed of the boat be "B" kmph and speed of the current be "C" kmph

So, 4 (B-C) = 44 => B+C = 11

4 (B-C) = 28 => B - C = 7

Solving both the equations, B = 9 kmph

13. Let the distance between his house and office be "X" km

So, (X km / 60 kmph) - (X km / 80 kmph) = ((5-(-3)) / 60 hours

=> X = 32 km

Shortcut Technique :

Required Distance = (Products of Speeds / Difference of Speeds) x Difference in Time

=> ((80 x 60) x (80+60)) x (8/60) = 32 km

14.  Here original time is not required

Required speed = (240 km / 4 hours) = 60 kmph

15. Let the original speed is "X" kmph

So, (180/X) - ((180 / (X+10)) = 54 / 60

=> X = 40 kmph

16. Let the distance between the places be "X" km

=> ((X / (7+3)) + ((X / (7-3)) = 21  => X = 60 km

17. When time is same in each case, the average speed will be the simple average of the speeds

=> Average Speed =  ((45 + 75 + 30) / 3) =  150 / 3

= 50 kmph

18. Let the length of the train be "X" metres

=> ((80 + X) / 100) = ((400+X)/60)

=> X = 200 m

19. Time for meeting each other is 8 hours

The relative speed is 65 + 80 = 145kmph (opposite direction)

So, Distance between A and B

= 145 x 8 = 1160 km

20. Let the speed of the boat be "B" kmph

=> ((60 / (B+)) = ((36 / (B-3))

=> B = 12 kmph

1. Satyannarayana YedlaOctober 8, 2014 at 9:22 PM

Thanks

2. thank u so much mam

3. Thanks a lot

4. Well bhuvi

5. when will be the result of sbi clerks? plz anyone tell the result date

6. i've wrote so many exams in banking field .... till now i'm not selected in anyone . i don't know what is lacking in me..... plz provide me some tips for ibps po .... i'm going to write tis exam in coming sunday oct 12....

7. 8. pls give some practice problem on time n work and input output

9. Please provide latest appointments in india and world of 2014

10. Thnku for sharing gr8 info.....

11. In which section ur failing to secure

12. just try to give ur best one day u ll achieve ur dream all the best bro for ur exam

13. maths(simplification(5),approximation(5),number series(5),DI(15))
reasoning(puzzle,circle,seating,input output,syllogism)
focus mainly on this u will get good score...
all the best

14. thanks shivani mam....

15. check q no 8 --> x/12-2

16. aptitute section....

17. thanks na.....

18. how to solve seating arrangement sir ? plz tell me

19. how many such pairs of letters are there in the word INTEREST each of which has as many letters between them in the word as in the English alphabetical series? till now i didn't understand tis type of question plz explain the solution sir....

20. More explanation needed on ques num 4

21. U hv to findout the letter pairs which hv the no of letters betweeen them in the alphabetical series equal to the no of letters between them in the word given.for ex here let us take the pair IN, here no letter between I And N but in alphabetical series we hv j k l m =4 letters between them so this pair doesn't satisfy the given condition. Now lets take the pair ST here no letter between them and in alphabetical series also we hv no letters between S and T so this pair satisfy our condition , similarly find such pairs in the given word.

22. i got minimum three pairs in the word ... is it correct mam....

23. Hi SuganyaNS,

In the exam write alphabets and their corresponding number in the rough sheet.This can help you in solving this type of question.
a -1
b-2
z-26

For ex INTER i-9 n-14 t-20 e-5 r-18

Here
count the numbers which u feel nearest. 18 and 20 are near to each other.

t and r has the same letters.

18,19,20

24. for quant try to solve di first
do practice as many sets as u can
try to keep you score above 25
in reasoning
avoid puzzles first
sove the rest
in the last if you get time finds puzzle easy go for it
25+ is a good score for po
all the best

25. No there r four such pairs TR ST NS NT, u hv to look in backward direction also

26. Hi SuganyaNS,

Please solve more seating arrangement this way u can get practice it.

But my suggestion is don't attend seating arrangement if you are not confident this is because po seating arrangement will be high level and it takes more time solving.

But if your confident and practiced enough in solving previous year po questions you can attempt it.

27. Very Simple ANS Is 4 pair NS, NT, ST, RT
I N T E R E S T
9 14 20 5 18 5 19 20

28. thanks na.....

29. thanks mam... SEASON... in this word . NO,NS,AS

30. There are four pairs.
1)N-S(in INTEREST- TERE- 4 letters between N & S, in alphabet OPQR- 4 letters)
2)N-T(in INTEREST- TERES- 5 letters between N & last T, in alphabet OPQRS- 5 letters)
3)T-R(in INTEREST- only E- 1 letter between 1st T & R, in alphabet only S- 1 letter)
4)S-T(in INTEREST- no letter between S& T, in alphabet no letter between S & T).

31. The answer is SO, SN, ON.

32. sir whoto sovle (s-1)*9/8 please repley

33. thanks......... thank u so much now only i can understand.... it..
BALANCE ans LMN-LAN, AB-BA, ABC-ANC crt ah na....

34. thanks na....

35. another problem BANTER ans (2) RST-RET, AB-BA crt ah na

36. When is ur Exam ??

37. oct 12 na... tis sunday

38. Me too morning batch.I am coimbatore saravanampatti venue akshaya Engg College. U ???

39. mine is madurai kln college.... plz give me one seating arrangement question na i'll solve it nd tell the answer .. rectify my errors na....

40. Thanks........

41. Hi SUgan,

I ll give u a tip just try to attempt the questions u know and don't answer if u r not sure.

First try to clear Sectional cut off and then overall cutoff.

Each section try to answer 15 correctly.

And then go for your strong section.

First attempt computer then GA and English.

In english only attempt sentence arrangement,error correction,fill in blanks. Total 20.

For the above three section allot 45 mins.

Remain two section use the 1hr 15 mins.

Follow this u ll surely get enough time and can clear the exam.

All the best.

42. Hi sugan,

Visit the link download the previous year question papers and solve 2013 year question paper seating question no 7.

43. Sorry solve 2012 question paper. qno 22

44. mine is madurai kln college.... plz give me one seating arrangement question na i'll solve it nd tell the answer .. rectify my errors na....

45. There are eight friends S,T,U,V,W,X,Y, and Z sitting around a circular table facing the centre and playing cards but not necessarily in the same order. All of them have a favourite card among these eight cards. Out of these eight cards, four are Kings and four are Queens of spade, club, diamond and heart.

S like the Queen of spade and is not an immediate neighbour of the one who likes the King of club. The one who likes the Queen of diamond sits on the immediate left of T, who likes the Queen of club. U likes the King of club and sits third to the left of W. The one who likes the king of spade and the one who likes the Queen of diamond are immediate neighbours of each other but both of them are the neighbours neither of W nor of U. The one who likes the King of diamond and the one who likes the Queen of spade are immediate neighbours of each other. Neither W nor V likes the king of diamond. Only X sits between the one who likes the Queen of diamond and the who likes the Queen of heart, Y sits third to the left of the person who likes the king of diamond.

plz tell me how to solve this problem.......

46. There are eight friends S,T,U,V,W,X,Y, and Z sitting around a circular table facing the centre and playing cards but not necessarily in the same order. All of them have a favourite card among these eight cards. Out of these eight cards, four are Kings and four are Queens of spade, club, diamond and heart.

S like the Queen of spade and is not an immediate neighbour of the one who likes the King of club. The one who likes the Queen of diamond sits on the immediate left of T, who likes the Queen of club. U likes the King of club and sits third to the left of W. The one who likes the king of spade and the one who likes the Queen of diamond are immediate neighbours of each other but both of them are the neighbours neither of W nor of U. The one who likes the King of diamond and the one who likes the Queen of spade are immediate neighbours of each other. Neither W nor V likes the king of diamond. Only X sits between the one who likes the Queen of diamond and the who likes the Queen of heart, Y sits third to the left of the person who likes the king of diamond.

anyone plz tell me how to solve this problem.......

47. Pratibha Manveer KashinwarOctober 9, 2014 at 4:41 PM

thanx to u very much

48. pls send motivation messages for ba aspirants

49. avg speed is not (a+b+c), it is 3ab/(ab+bc+ca)....in question 17, answer is option A,pls correct this

50. sir i understand syllogims some wht but i dnt understand correctly wt is atleast,some

plz give sme tips related to that

51. Intially I had the problems of shivering, tension. when i read question i was just reading it not understanding it because of tension, so it takes more time. As a result in 1 Big exam became a big flop ie marks was too disappointing. After that i changed my strategy. I will mail you if you provide me your ID because it takes some space. Don't know whether it will work for you. But i too was in similar situation like you then. Now atleast am able to pass written exams well

52. thanks na........... tis is my id suganyaselvaraj.n@gmail.com

53. hi vishnu ..can u pls share ur exam strategy preparation with me as
well...evn iam struggling to clear written test...it would b great help
fr me if u share wit me ...thnks..my mail id ramya.cooldude@gmail.com

54. hi vishnu ..can u pls share ur exam strategy preparation with me as
well...evn iam struggling to clear written test...it would b great help
fr me if u share wit me ...thnks.. deepakshrm898@gmail.com