A sound wave covers a distance of 1.36 km in 4 seconds. Find the speed of sound in m/s. MCQ with Answer and Explanation

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A sound wave covers a distance of 1.36 km in 4 seconds. Find the speed of sound in m/s.

A. 320 m/s

B. 340 m/s

C. 360 m/s

D. 350 m/s

Answer: Option B

Solution (By JKSSB Mock Tests)

Distance = 1.36 km = 1360 meters. Speed = Distance / Time = 1360 / 4 = 340 m/s.

This question belongs to: Maths Time Speed and Distance

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Question #1

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If a person covers a distance of 180 km in 4 hours, find his speed in meters per second.

A. 13.5 m/s

B. 14.5 m/s

C. 11.5 m/s

D. 12.5 m/s

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Correct Answer: Option D

Explanation:
Speed = 180 / 4 = 45 km/h. Converting to m/s = 45 * (5/18) = 12.5 m/s.

This question belongs to: Maths Time Speed and Distance

Question #2

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A passenger train clears a station side signal pillar in exactly 12 seconds. If the length of the train is 180 meters, find its speed in km/h.

A. 72 km/h

B. 48 km/h

C. 60 km/h

D. 54 km/h

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Correct Answer: Option D

Explanation:
Speed of train = 180 / 12 = 15 m/s. Converting to km/h = 15 * (18/5) = 54 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3

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The speed of a train is 25% more than the speed of a car. Both start from city P at the same time and reach city Q, 150 km away, at the same time. On the way, the train stops for 15 minutes at various stations. What is the speed of the car?

A. 120 km/h

B. 150 km/h

C. 140 km/h

D. 100 km/h

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Correct Answer: Option A

Explanation:
Let car speed be c, then train speed is 1.25c. Time difference = 150/c - 150/(1.25c) = 15/60 hour = 1/4 hour. 150/c * (1 - 1/1.25) = 1/4 => 150/c * (0.25/1.25) = 1/4 => 150/c * (1/5) = 1/4 => 30/c = 1/4 => c = 120 km/h.

This question belongs to: Maths Time Speed and Distance

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