If a person covers a distance of 150 km in 3 hours, what is his speed in meters per second? MCQ with Answer and Explanation

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If a person covers a distance of 150 km in 3 hours, what is his speed in meters per second?

A. 15 m/s

B. 12.5 m/s

C. 13.88 m/s

D. 16.66 m/s

Answer: Option C

Solution (By JKSSB Mock Tests)

Speed = 150 / 3 = 50 km/h. In m/s = 50 * (5/18) = 250 / 18 = 13.88 m/s.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A train 200 meters long covers a telegraph post in 10 seconds. Find the time it takes to cover a bridge of 300 meters.

A. 15 seconds

B. 25 seconds

C. 20 seconds

D. 30 seconds

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Correct Answer: Option B

Explanation:
Speed of train = 200 / 10 = 20 m/s. Total distance to cross bridge = 200 + 300 = 500 meters. Time = 500 / 20 = 25 seconds.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train running at 90 km/h crosses a platform double its length in 36 seconds. What is the length of the platform?

A. 500 meters

B. 750 meters

C. 600 meters

D. 400 meters

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Correct Answer: Option C

Explanation:
Speed of train = 90 * (5/18) = 25 m/s. Total distance covered in 36 seconds = 25 * 36 = 900 meters. Let train length be L, so platform length = 2L. L + 2L = 900 => 3L = 900 => L = 300 meters. Platform length = 2L = 600 meters.

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Question #3

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The speed of two trains are in the ratio 4 : 5. If the second train covers 300 km in 3 hours, find the speed of the first train.

A. 75 km/h

B. 90 km/h

C. 85 km/h

D. 80 km/h

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Correct Answer: Option D

Explanation:
Speed of the second train = 300 / 3 = 100 km/h. Speed ratio is 4:5, so 5 parts = 100 km/h => 1 part = 20 km/h. Speed of the first train = 4 parts = 4 * 20 = 80 km/h.

This question belongs to: Maths Time Speed and Distance

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