A train running at 60 km/h crosses a bridge 200 meters long in 24 seconds. Find the length of the train. MCQ with Answer and Explanation

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A train running at 60 km/h crosses a bridge 200 meters long in 24 seconds. Find the length of the train.

A. 200 meters

B. 180 meters

C. 220 meters

D. 240 meters

Answer: Option A

Solution (By JKSSB Mock Tests)

Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.

This question belongs to: Maths Time Speed and Distance

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Question #1

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The speed of a train is 54 km/h. How many meters does it cross in 20 seconds?

A. 300 meters

B. 350 meters

C. 400 meters

D. 250 meters

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Correct Answer: Option A

Explanation:
Speed = 54 * (5/18) = 15 m/s. Distance in 20 seconds = Speed * Time = 15 * 20 = 300 meters.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train 250 meters long takes 30 seconds to cross a man running at 6 km/h in the opposite direction. Find the speed of the train.

A. 36 km/h

B. 24 km/h

C. 42 km/h

D. 30 km/h

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Correct Answer: Option B

Explanation:
Relative speed = 250 / 30 = 25/3 m/s = (25/3) * (18/5) = 30 km/h. In opposite directions, Relative Speed = Speed of train + Speed of man => 30 = Speed of train + 6 => Speed of train = 24 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3

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A person can row 10 km/h in still water. If the speed of the river current is 3 km/h, find the time taken to row 28 km upstream.

A. 5 hours

B. 4 hours

C. 6 hours

D. 3 hours

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Correct Answer: Option B

Explanation:
Upstream speed = 10 - 3 = 7 km/h. Time taken = 28 / 7 = 4 hours.

This question belongs to: Maths Time Speed and Distance

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