A sound wave maps along a linear distance path at 340 m/s. How many kilometers does it cover in exactly 25 seconds? MCQ with Answer and Explanation

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A sound wave maps along a linear distance path at 340 m/s. How many kilometers does it cover in exactly 25 seconds?

A. 9.5 km

B. 8.5 km

C. 8.0 km

D. 9.0 km

Answer: Option B

Solution (By JKSSB Mock Tests)

Distance = Speed * Time = 340 * 25 = 8500 meters. Converting to kilometers = 8500 / 1000 = 8.5 km.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A sound wave travels at 343 m/s. How much distance in kilometers does it cover in 10 seconds?

A. 3.43 km

B. 3.65 km

C. 3.50 km

D. 3.24 km

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Correct Answer: Option A

Explanation:
Distance = Speed * Time = 343 * 10 = 3430 meters. Converting to kilometers = 3430 / 1000 = 3.43 km.

This question belongs to: Maths Time Speed and Distance

Question #2

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A contract courier can travel at 40 km/h to deliver a package on time. If he travels at 30 km/h, he is late by 2 hours. What is the distance he has to cover?

A. 180 km

B. 300 km

C. 260 km

D. 240 km

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Correct Answer: Option D

Explanation:
Let the distance be d. Time difference = 2 hours. d/30 - d/40 = 2 => (4d - 3d) / 120 = 2 => d / 120 = 2 => d = 240 km.

This question belongs to: Maths Time Speed and Distance

Question #3

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A car climbs a mountain path 12 km long at 4 km/h and descends the same distance at 12 km/h. Find the average speed for the round journey.

A. 8 km/h

B. 5 km/h

C. 6 km/h

D. 7 km/h

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Correct Answer: Option C

Explanation:
Average Speed = 2xy / (x + y) = (2 * 4 * 12) / (4 + 12) = 96 / 16 = 6 km/h.

This question belongs to: Maths Time Speed and Distance

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