A train running at 72 km/h crosses a bridge 250 meters long in 20 seconds. Find the length of the train. MCQ with Answer and Explanation

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A train running at 72 km/h crosses a bridge 250 meters long in 20 seconds. Find the length of the train.

A. 200 meters

B. 120 meters

C. 180 meters

D. 150 meters

Answer: Option D

Solution (By JKSSB Mock Tests)

Speed = 72 * (5/18) = 20 m/s. Total distance in 20 seconds = 20 * 20 = 400 meters. Length of train = 400 - 250 = 150 meters.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A cyclist covers 750 meters in 2 minutes 30 seconds. Find his speed in km/h.

A. 15 km/h

B. 22 km/h

C. 18 km/h

D. 20 km/h

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Correct Answer: Option C

Explanation:
Time = 2 minutes 30 seconds = 150 seconds. Speed = 750 / 150 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A transport truck covers a route track of 480 km in 8 hours. How much time will it require to clear a distance path of 360 km given it tracks at the same speed?

A. 6.0 hours

B. 7.0 hours

C. 6.5 hours

D. 5.5 hours

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Correct Answer: Option A

Explanation:
Speed of truck = 480 / 8 = 60 km/h. Time taken for 360 km path = 360 / 60 = 6 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

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A person walking at 4 km/h covers a certain distance. If he runs at 8 km/h, he takes 30 minutes less to cover the same distance. Find the distance.

A. 5.0 km

B. 4.5 km

C. 3.5 km

D. 4.0 km

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Correct Answer: Option D

Explanation:
Time difference = 30 minutes = 0.5 hours. Let distance be d. d / 4 - d / 8 = 0.5 => d / 8 = 0.5 => d = 4 km.

This question belongs to: Maths Time Speed and Distance

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