A sound wave travels at 330 m/s. How long does it take to cover a distance of 3.3 km? MCQ with Answer and Explanation

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A sound wave travels at 330 m/s. How long does it take to cover a distance of 3.3 km?

A. 14 seconds

B. 12 seconds

C. 8 seconds

D. 10 seconds

Answer: Option D

Solution (By JKSSB Mock Tests)

Distance = 3.3 km = 3300 meters. Time taken = 3300 / 330 = 10 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A delivery car handles a total route profile of 360 km. It clears the first half stretch at 45 km/h and the second half at 90 km/h. Find the net average speed.

A. 64 km/h

B. 60 km/h

C. 56 km/h

D. 68 km/h

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Correct Answer: Option B

Explanation:
Average Speed = 2xy / (x + y) = (2 * 45 * 90) / (45 + 90) = 8100 / 135 = 60 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A boat can row 10 km/h in still water. If the river velocity is 2 km/h, find the distance covered downstream by the boat in 30 minutes.

A. 5 km

B. 8 km

C. 7 km

D. 6 km

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Correct Answer: Option D

Explanation:
Downstream speed = 10 + 2 = 12 km/h. Time = 30 minutes = 0.5 hour. Distance covered = Speed * Time = 12 * 0.5 = 6 km.

This question belongs to: Maths Time Speed and Distance

Question #3

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A high-speed train covers 450 km in 3 hours. Find its speed in meters per second.

A. 45 m/s

B. 40 m/s

C. 41.67 m/s

D. 38.33 m/s

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Correct Answer: Option C

Explanation:
Speed = 450 / 3 = 150 km/h. In m/s = 150 * (5/18) = 750 / 18 = 41.67 m/s.

This question belongs to: Maths Time Speed and Distance

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