A runner covers 200 meters in 22 seconds. Find his approximate speed in km/h. MCQ with Answer and Explanation

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A runner covers 200 meters in 22 seconds. Find his approximate speed in km/h.

A. 32.7 km/h

B. 30.5 km/h

C. 34.2 km/h

D. 36.0 km/h

Answer: Option A

Solution (By JKExamLibrary)

Speed = 200 / 22 m/s = 100 / 11 m/s. In km/h = (100 / 11) * (18/5) = 360 / 11 = 32.72 km/h.

This question belongs to: Maths Time Speed and Distance

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Two trains 110 meters and 90 meters long are running in opposite directions at speeds of 36 km/h and 54 km/h respectively. In what time will they pass each other completely?

A. 8 seconds

B. 12 seconds

C. 6 seconds

D. 10 seconds

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Correct Answer: Option A

Explanation:
Total distance = 110 + 90 = 200 meters. Relative speed in opposite directions = 36 + 54 = 90 km/h = 90 * (5/18) = 25 m/s. Time taken = 200 / 25 = 8 seconds.

This question belongs to: Maths Time Speed and Distance