alleryConvert 72 km/h to m/s.
- $25$ m/s
- $20$ m/s
- $15$ m/s
- $10$ m/s
Show answer and solution
Correct answer: B. $20$ m/s
km/h to m/s: multiply by 5/18. 72 × 5/18 = 360/18 = 20 m/s.
CAT Time, Speed and Distance — practice questions
Explore 17 free Time, Speed and Distance questions in CAT Quantitative Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
Practise Time, Speed and Distance with Quill →Time, Speed and Distance questions and exercises with answers
Showing questions 1–17 of 17.
Convert 72 km/h to m/s.Read the answer and worked solution →A car covers the first 60 km at 30 km/h and the next 60 km at 60 km/h. What is the average speed for the whole journey?Read the answer and worked solution →A bus travels equal distances at 40 km/h and 60 km/h. What is the average speed for the whole journey?Read the answer and worked solution →A 150-metre train at 54 km/h crosses a stationary pole. How long does it take?Read the answer and worked solution →A 200-metre train at 36 km/h crosses a 100-metre platform. How long does it take?Read the answer and worked solution →A boat covers 24 km downstream in 2 hours and the same 24 km upstream in 3 hours. What is the speed of the stream?Read the answer and worked solution →A car that usually takes 6 hours for a trip now takes 4 hours due to a higher speed. By what factor did the speed increase?Read the answer and worked solution →Pipe A fills a tank in 8 hours; Pipe B fills it in 12 hours. How long do both pipes take together?Read the answer and worked solution →A driver increases his speed by 25%. By what percentage does the journey time decrease (for the same distance)?Read the answer and worked solution →For a fixed distance, if the speed is increased then the time taken:Read the answer and worked solution →A journey takes 120 km at a steady 60 km per hour. The time taken is:Read the answer and worked solution →Zaheeda doubles her speed on the same route. The time she takes:Read the answer and worked solution →A car covers 300 km at 50 km per hour. At 75 km per hour the same trip would take:Read the answer and worked solution →A train 150 m long runs at 54 km per hour. The time it takes to pass a pole is:Read the answer and worked solution →A train 200 m long crosses a 100 m platform at 36 km per hour. It takes:Read the answer and worked solution →A man travels equal distances at 40 km per hour and at 60 km per hour. His average speed is:Read the answer and worked solution →A man covers a distance in 6 hours at 40 km per hour. To cover it in 4 hours he must travel at:Read the answer and worked solution →
Worked practice questions
A car covers the first 60 km at 30 km/h and the next 60 km at 60 km/h. What is the average speed for the whole journey?
- $40$ km/h
- $45$ km/h
- $48$ km/h
- $50$ km/h
Show answer and solution
Correct answer: A. $40$ km/h
Total distance = 120 km.
Time on first leg = 60/30 = 2 h.
Time on second leg = 60/60 = 1 h. Total time = 3 h.
Average speed = 120/3 = 40 km/h.
(Simple average 45 km/h is the trap.)
A bus travels equal distances at 40 km/h and 60 km/h. What is the average speed for the whole journey?
- $50$ km/h
- $45$ km/h
- $48$ km/h
- $52$ km/h
Show answer and solution
Correct answer: C. $48$ km/h
Equal-distance legs use harmonic mean: 2ab/(a+b) = 2 × 40 × 60 / (40+60) = 4800/100 = 48 km/h.
How to practise
- Choose a Time, Speed and Distance question and try to work out your answer.
- Open the question to check the correct answer and read its worked solution.
- Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.
Put it into practice
Continue with Time, Speed and Distance practice for CAT. Read explanations as you go. No signup form needed to start.
Practise Time, Speed and Distance →