A sound wave travels at 340 m/s. How much distance in kilometers does it cover in exactly 15 seconds? MCQ with Answer and Explanation

A sound wave travels at 340 m/s. How much distance in kilometers does it cover in exactly 15 seconds?
A. 5.1 km
B. 4.8 km
C. 5.7 km
D. 5.4 km
Answer: Option A
Solution (By JKSSB Mock Tests)
Distance = Speed * Time = 340 * 15 = 5100 meters. Converting to kilometers = 5100 / 1000 = 5.1 km.

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Practice More Time Speed and Distance Questions

Question #1
A man rows a distance of 12 km downstream in 1.5 hours and returns upstream in 3 hours. Find the speed of the river current.
A. 2.2 km/h
B. 2.0 km/h
C. 2.5 km/h
D. 1.8 km/h

Correct Answer: Option B


Explanation:
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.

This question belongs to: Maths Time Speed and Distance
Question #2
Two cities A and B are 360 km apart. A car goes from A to B at 40 km/h and returns to A at 60 km/h. Find the average speed of the car.
A. 50 km/h
B. 52 km/h
C. 55 km/h
D. 48 km/h

Correct Answer: Option D


Explanation:
Average speed = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A thief is spotted by a policeman from a distance of 150 meters. The thief runs at 11 km/h and the policeman chases him at 12 km/h. Find the distance covered by the thief before he is caught.
A. 1950 meters
B. 1800 meters
C. 1650 meters
D. 1500 meters

Correct Answer: Option C


Explanation:
Relative speed = 12 - 11 = 1 km/h. Time to catch the thief = 0.15 km / 1 km/h = 0.15 hours. Distance covered by thief = Speed * Time = 11 km/h * 0.15 hours = 1.65 km = 1650 meters.

This question belongs to: Maths Time Speed and Distance