A car travels at a speed of 54 km/h. What is its speed expressed in meters per second? MCQ with Answer and Explanation

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A car travels at a speed of 54 km/h. What is its speed expressed in meters per second?

A. 12 m/s

B. 15 m/s

C. 18 m/s

D. 10 m/s

Answer: Option B

Solution (By JKSSB Mock Tests)

To convert km/h to m/s, multiply by 5/18. Speed = 54 * (5/18) = 3 * 5 = 15 m/s.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A person rows 18 km downstream in 2 hours and covers the same distance upstream in 6 hours. What is the speed of the boat in still water?

A. 5 km/h

B. 7 km/h

C. 6 km/h

D. 8 km/h

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Correct Answer: Option C

Explanation:
Downstream speed = 18 / 2 = 9 km/h. Upstream speed = 18 / 6 = 3 km/h. Speed in still water = (9 + 3) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A truck covers a distance of 240 km in 4 hours. How much time will it take to cover a distance of 180 km at the same speed?

A. 4.0 hours

B. 3.5 hours

C. 2.5 hours

D. 3.0 hours

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Correct Answer: Option D

Explanation:
Speed of truck = 240 / 4 = 60 km/h. Time taken for 180 km = 180 / 60 = 3 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

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A legal clerk walks from his residence to the courthouse at 5 km/h and arrives 15 minutes late. If he sets a pace of 7.5 km/h, he arrives 5 minutes early. Find the distance.

A. 5.5 km

B. 5.0 km

C. 6.0 km

D. 4.5 km

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Correct Answer: Option B

Explanation:
Time difference = 15 - (-5) = 20 minutes = 20/60 = 1/3 hours. Let distance be d. d/5 - d/7.5 = 1/3 => (1.5d - d) / 7.5 = 1/3 => 0.5d / 7.5 = 1/3 => d / 15 = 1/3 => d = 5 km.

This question belongs to: Maths Time Speed and Distance

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