A professional athlete tracks a loop of radius 140 meters in 88 seconds. What is his speed in km/h? MCQ with Answer and Explanation

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A professional athlete tracks a loop of radius 140 meters in 88 seconds. What is his speed in km/h?

A. 32 km/h

B. 44 km/h

C. 36 km/h

D. 40 km/h

Answer: Option C

Solution (By JKSSB Mock Tests)

Circumference of loop = 2 * (22/7) * 140 = 880 meters. Speed = 880 / 88 = 10 m/s. Converting to km/h = 10 * (18/5) = 36 km/h.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A passenger train 140 meters long passes an active bridge platform 310 meters long in 20 seconds. What is the speed of the train in km/h?

A. 75 km/h

B. 90 km/h

C. 85 km/h

D. 81 km/h

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Correct Answer: Option D

Explanation:
Total distance = 140 + 310 = 450 meters. Speed = 450 / 20 = 22.5 m/s. In km/h = 22.5 * (18/5) = 4.5 * 18 = 81 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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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. 16.66 m/s

B. 15 m/s

C. 13.88 m/s

D. 12.5 m/s

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Correct Answer: Option C

Explanation:
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

Question #3

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A wheel has a radius of 14 cm. How many revolutions must it make to cover a distance of 88 meters?

A. 80

B. 120

C. 150

D. 100

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Correct Answer: Option D

Explanation:
Circumference of the wheel = 2 * (22/7) * 14 = 88 cm = 0.88 meters. Total distance = 88 meters. Number of revolutions = 88 / 0.88 = 100.

This question belongs to: Maths Time Speed and Distance

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