A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 10 seconds. MCQ with Answer and Explanation

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A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 10 seconds.

A. 3.4 km

B. 3.8 km

C. 3.2 km

D. 3.6 km

Answer: Option A

Solution (By JKSSB Mock Tests)

Distance = Speed * Time = 340 * 10 = 3400 meters = 3.4 km.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A train 240 meters long crosses a platform 360 meters long in 30 seconds. What is the speed of the train in km/h?

A. 64 km/h

B. 60 km/h

C. 80 km/h

D. 72 km/h

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Correct Answer: Option D

Explanation:
Total distance to cross = 240 + 360 = 600 meters. Speed = 600 / 30 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A courier covers 40 km of his shift route at 20 km/h and the remaining 60 km at 30 km/h. Find his average speed across the whole shift.

A. 26 km/h

B. 24 km/h

C. 25 km/h

D. 28 km/h

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Correct Answer: Option C

Explanation:
Total distance = 40 + 60 = 100 km. Time for first sector = 40 / 20 = 2 hours. Time for second sector = 60 / 30 = 2 hours. Total time = 4 hours. Average speed = 100 / 4 = 25 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3

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A car covers a certain distance at 54 km/h in 4 hours. How much time will it take to cover the same distance at 72 km/h?

A. 2.5 hours

B. 4 hours

C. 3.5 hours

D. 3 hours

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Correct Answer: Option D

Explanation:
Distance = 54 * 4 = 216 km. New time required = 216 / 72 = 3 hours.

This question belongs to: Maths Time Speed and Distance

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