A mechanical wheel has a radius of 7 cm. How many revolutions are required to cover a linear distance of 44 meters? MCQ with Answer and Explanation

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A mechanical wheel has a radius of 7 cm. How many revolutions are required to cover a linear distance of 44 meters?

A. 120

B. 100

C. 150

D. 80

Answer: Option B

Solution (By JKSSB Mock Tests)

Circumference of the wheel = 2 * (22/7) * 7 = 44 cm = 0.44 meters. Total distance = 44 meters. Number of revolutions = 44 / 0.44 = 100.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A train passes an active signal light in 10 seconds. If the length of the train is 150 meters, find its speed in km/h.

A. 60 km/h

B. 54 km/h

C. 72 km/h

D. 48 km/h

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Correct Answer: Option B

Explanation:
Speed of train = 150 / 10 = 15 m/s. In km/h = 15 * (18/5) = 54 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A sound wave travels at 330 m/s. How long does it take to cover a distance of 6.6 km?

A. 24 seconds

B. 22 seconds

C. 20 seconds

D. 18 seconds

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Correct Answer: Option C

Explanation:
Distance = 6.6 km = 6600 meters. Time taken = 6600 / 330 = 20 seconds.

This question belongs to: Maths Time Speed and Distance

Question #3

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A vehicle runs at 30 km/h for 3 hours and 60 km/h for the next 2 hours. Find the average speed for the whole journey.

A. 40 km/h

B. 42 km/h

C. 45 km/h

D. 48 km/h

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Correct Answer: Option B

Explanation:
Distance 1 = 30 * 3 = 90 km. Distance 2 = 60 * 2 = 120 km. Total distance = 210 km. Total time = 3 + 2 = 5 hours. Average speed = 210 / 5 = 42 km/h.

This question belongs to: Maths Time Speed and Distance

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