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DRDO CEPTAM Speed, Time & Distance Questions with Answers & Explanations

20 Speed, Time & Distance questions from the Quantitative Ability section of DRDO CEPTAM, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

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Question 1

A train 360 m long is running at 108 km/h. How long will it take to cross a pole?

  1. A15 seconds
  2. B14 seconds
  3. C12 seconds
  4. D13 seconds
Show answer
Answer: (C) 12 seconds Speed = 108 × 5/18 = 30 m/s; time = 360 ÷ 30 = 12 s.
Question 2

A speed of 54 km/h is equal to

  1. A15 m/s
  2. B20 m/s
  3. C10 m/s
  4. D27 m/s
Show answer
Answer: (A) 15 m/s Multiply by 5/18: 54 × 5/18 = 15 m/s.
Question 3

A person travels from P to Q at 40 km/h and returns at 60 km/h. What is the average speed for the whole journey?

  1. A45 km/h
  2. B48 km/h
  3. C50 km/h
  4. D53 km/h
Show answer
Answer: (B) 48 km/h For equal distances, average speed = 2ab/(a + b) = 48 km/h.
Question 4

A boat goes 42 km downstream in 3 hours and 30 km upstream in 3 hours. What is the speed of the stream?

  1. A4 km/h
  2. B2 km/h
  3. C12 km/h
  4. D10 km/h
Show answer
Answer: (B) 2 km/h Downstream speed = 14, upstream = 10; stream = (downstream − upstream)/2 = 2 km/h.
Question 5

A train 170 m long running at 72 km/h crosses a platform in 18 seconds. What is the length of the platform?

  1. A220 m
  2. B360 m
  3. C170 m
  4. D190 m
Show answer
Answer: (D) 190 m Distance covered = 20 × 18 = 360 m = train + platform, so platform = 190 m.
Question 6

A person travels from P to Q at 60 km/h and returns at 40 km/h. What is the average speed for the whole journey?

  1. A45 km/h
  2. B48 km/h
  3. C53 km/h
  4. D50 km/h
Show answer
Answer: (B) 48 km/h For equal distances, average speed = 2ab/(a + b) = 48 km/h.
Question 7

A train 70 m long running at 36 km/h crosses a platform in 21 seconds. What is the length of the platform?

  1. A170 m
  2. B120 m
  3. C210 m
  4. D140 m
Show answer
Answer: (D) 140 m Distance covered = 10 × 21 = 210 m = train + platform, so platform = 140 m.
Question 8

A speed of 162 km/h is equal to

  1. A40 m/s
  2. B81 m/s
  3. C50 m/s
  4. D45 m/s
Show answer
Answer: (D) 45 m/s Multiply by 5/18: 162 × 5/18 = 45 m/s.
Question 9

A boat goes 63 km downstream in 3 hours and 51 km upstream in 3 hours. What is the speed of the stream?

  1. A2 km/h
  2. B4 km/h
  3. C17 km/h
  4. D3 km/h
Show answer
Answer: (A) 2 km/h Downstream speed = 21, upstream = 17; stream = (downstream − upstream)/2 = 2 km/h.
Question 10

A train 450 m long is running at 108 km/h. How long will it take to cross a pole?

  1. A16 seconds
  2. B13 seconds
  3. C15 seconds
  4. D11 seconds
Show answer
Answer: (C) 15 seconds Speed = 108 × 5/18 = 30 m/s; time = 450 ÷ 30 = 15 s.

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Question 11

A train 80 m long running at 90 km/h crosses a platform in 27 seconds. What is the length of the platform?

  1. A625 m
  2. B675 m
  3. C575 m
  4. D595 m
Show answer
Answer: (D) 595 m Distance covered = 25 × 27 = 675 m = train + platform, so platform = 595 m.
Question 12

A speed of 198 km/h is equal to

  1. A50 m/s
  2. B60 m/s
  3. C55 m/s
  4. D99 m/s
Show answer
Answer: (C) 55 m/s Multiply by 5/18: 198 × 5/18 = 55 m/s.
Question 13

A boat goes 66 km downstream in 3 hours and 54 km upstream in 3 hours. What is the speed of the stream?

  1. A18 km/h
  2. B20 km/h
  3. C2 km/h
  4. D4 km/h
Show answer
Answer: (C) 2 km/h Downstream speed = 22, upstream = 18; stream = (downstream − upstream)/2 = 2 km/h.
Question 14

A train 275 m long is running at 90 km/h. How long will it take to cross a pole?

  1. A11 seconds
  2. B12 seconds
  3. C9 seconds
  4. D10 seconds
Show answer
Answer: (A) 11 seconds Speed = 90 × 5/18 = 25 m/s; time = 275 ÷ 25 = 11 s.
Question 15

A person travels from P to Q at 45 km/h and returns at 90 km/h. What is the average speed for the whole journey?

  1. A60 km/h
  2. B57 km/h
  3. C62 km/h
  4. D67.5 km/h
Show answer
Answer: (A) 60 km/h For equal distances, average speed = 2ab/(a + b) = 60 km/h.
Question 16

A train 100 m long running at 54 km/h crosses a platform in 25 seconds. What is the length of the platform?

  1. A275 m
  2. B375 m
  3. C305 m
  4. D255 m
Show answer
Answer: (A) 275 m Distance covered = 15 × 25 = 375 m = train + platform, so platform = 275 m.
Question 17

A speed of 216 km/h is equal to

  1. A108 m/s
  2. B777.6 m/s
  3. C60 m/s
  4. D55 m/s
Show answer
Answer: (C) 60 m/s Multiply by 5/18: 216 × 5/18 = 60 m/s.
Question 18

A train 380 m long is running at 72 km/h. How long will it take to cross a pole?

  1. A21 seconds
  2. B19 seconds
  3. C20 seconds
  4. D23 seconds
Show answer
Answer: (B) 19 seconds Speed = 72 × 5/18 = 20 m/s; time = 380 ÷ 20 = 19 s.
Question 19

A person travels from P to Q at 30 km/h and returns at 60 km/h. What is the average speed for the whole journey?

  1. A42 km/h
  2. B45 km/h
  3. C40 km/h
  4. D37 km/h
Show answer
Answer: (C) 40 km/h For equal distances, average speed = 2ab/(a + b) = 40 km/h.
Question 20

A train 200 m long running at 54 km/h crosses a platform in 29 seconds. What is the length of the platform?

  1. A215 m
  2. B435 m
  3. C235 m
  4. D265 m
Show answer
Answer: (C) 235 m Distance covered = 15 × 29 = 435 m = train + platform, so platform = 235 m.

These are RankerClub practice questions written in the DRDO CEPTAM pattern. They are not official SSC/IBPS/RRB papers.

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