A cartwheel has a radius of 35 cm. How many revolutions must it make to cover a total distance of 1100 meters? MCQ with Answer and Explanation

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A cartwheel has a radius of 35 cm. How many revolutions must it make to cover a total distance of 1100 meters?

A. 600

B. 500

C. 400

D. 700

Answer: Option B

Solution (By JKSSB Mock Tests)

Circumference = 2 * (22/7) * 35 = 220 cm = 2.2 meters. Total distance = 1100 meters. Number of revolutions = 1100 / 2.2 = 500.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A person walks from home to school at 4 km/h and arrives 5 minutes late. If he runs at 5 km/h, he arrives 4 minutes early. Find the distance.

A. 3.0 km

B. 4.0 km

C. 2.5 km

D. 3.5 km

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Correct Answer: Option A

Explanation:
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.

This question belongs to: Maths Time Speed and Distance

Question #2

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Walking at 7/9 of his usual speed, an accountant is 20 minutes late to his branch. What is his usual time to reach the destination?

A. 90 minutes

B. 60 minutes

C. 80 minutes

D. 70 minutes

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Correct Answer: Option D

Explanation:
New speed = 7/9 of usual speed => New time = 9/7 of usual time. Difference = 2/7 of usual time = 20 minutes. Therefore, 1/7 of usual time = 10 minutes => Usual time = 70 minutes.

This question belongs to: Maths Time Speed and Distance

Question #3

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A swimmer can traverse 36 km downstream in 3 hours and covers 12 km upstream in 3 hours. Find the swimmer's baseline speed in still water.

A. 8 km/h

B. 10 km/h

C. 7 km/h

D. 9 km/h

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Correct Answer: Option A

Explanation:
Downstream speed = 36 / 3 = 12 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed in still water = (12 + 4) / 2 = 16 / 2 = 8 km/h.

This question belongs to: Maths Time Speed and Distance

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