A person runs around a circular track of circumference 400 meters. If his speed is 14.4 km/h, how many rounds can he complete in 10 minutes? MCQ with Answer and Explanation

Question

A person runs around a circular track of circumference 400 meters. If his speed is 14.4 km/h, how many rounds can he complete in 10 minutes?

A. 5 rounds

B. 6 rounds

C. 8 rounds

D. 7 rounds

Answer: Option B

Solution (By JKSSB Mock Tests)

Speed = 14.4 km/h = 14.4 * (5/18) = 4 m/s. Time = 10 minutes = 600 seconds. Total distance = 4 * 600 = 2400 meters. Number of rounds = 2400 / 400 = 6 rounds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A person travels a distance of 24 km at a speed of 6 km/h, another 24 km at 8 km/h and a third 24 km at 12 km/h. Find his average speed for the whole journey.

A. 9 km/h

B. 7.5 km/h

C. 8.5 km/h

D. 8 km/h

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Correct Answer: Option D

Explanation:
Total distance = 24 + 24 + 24 = 72 km. Total time = 24/6 + 24/8 + 24/12 = 4 + 3 + 2 = 9 hours. Average speed = 72 / 9 = 8 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A passenger express train 160 meters long runs at 72 km/h. How long will it take to clear a terminal platform 240 meters long?

A. 20 seconds

B. 18 seconds

C. 22 seconds

D. 24 seconds

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Correct Answer: Option A

Explanation:
Speed of train = 72 * (5/18) = 20 m/s. Total distance = 160 + 240 = 400 meters. Time taken = 400 / 20 = 20 seconds.

This question belongs to: Maths Time Speed and Distance

Question #3

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A train passes a static observer in 10 seconds and a platform 150 meters long in 16 seconds. Find the length of the train.

A. 280 meters

B. 250 meters

C. 300 meters

D. 200 meters

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Correct Answer: Option B

Explanation:
Time to cross the platform alone = 16 - 10 = 6 seconds. Speed of train = 150 / 6 = 25 m/s. Length of train = Speed * Time to pass observer = 25 * 10 = 250 meters.

This question belongs to: Maths Time Speed and Distance

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