A train crosses a bridge of length 150 meters in 15 seconds and a pole in 9 seconds. What is the length of the train? MCQ with Answer and Explanation

A train crosses a bridge of length 150 meters in 15 seconds and a pole in 9 seconds. What is the length of the train?

A. 250 meters

B. 300 meters

C. 225 meters

D. 200 meters

Answer: Option C

Let train length be L. Speed = L / 9. Also, Speed = (L + 150) / 15. So, L / 9 = (L + 150) / 15 => 15L = 9L + 1350 => 6L = 1350 => L = 225 meters.

This question belongs to: Maths Time Speed and Distance

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Question #1 Report Error

A train 100 meters long running at 54 km/h passes a standing pedestrian. Find the time taken to cross.

A. 6.0 seconds

B. 8.0 seconds

C. 6.66 seconds

D. 7.2 seconds

Correct Answer: Option C

Explanation:
Speed of train = 54 * (5/18) = 15 m/s. Time taken = 100 / 15 = 6.66 seconds.

This question belongs to: Maths Time Speed and Distance

Question #2 Report Error

A man covers half of his journey at 40 km/h and the remaining half at 60 km/h. What is his average speed?

A. 52 km/h

B. 48 km/h

C. 50 km/h

D. 54 km/h

Correct Answer: Option B

Explanation:
Average Speed = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3 Report Error

A car covers a certain distance at an average speed of 48 km/h in 5 hours. At what speed must it travel to cover the same distance in 4 hours?

A. 55 km/h

B. 65 km/h

C. 70 km/h

D. 60 km/h

Correct Answer: Option D

Explanation:
Distance = 48 * 5 = 240 km. New required speed = 240 / 4 = 60 km/h.

This question belongs to: Maths Time Speed and Distance