A sound wave takes 4 seconds to travel a distance between two structures. If the speed of sound is 340 m/s, what is the distance between the structures in kilometers? MCQ with Answer and Explanation

A sound wave takes 4 seconds to travel a distance between two structures. If the speed of sound is 340 m/s, what is the distance between the structures in kilometers?
A. 1.50 km
B. 1.24 km
C. 1.36 km
D. 1.42 km
Answer: Option C
Solution (By JKSSB Mock Tests)
Distance = Speed * Time = 340 * 4 = 1360 meters. Converting to kilometers = 1360 / 1000 = 1.36 km.

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Practice More Time Speed and Distance Questions

Question #1
A person rows 24 km downstream in 3 hours and covers the same distance upstream in 6 hours. What is the speed of the boat in still water.
A. 5 km/h
B. 7 km/h
C. 6 km/h
D. 8 km/h

Correct Answer: Option C


Explanation:
Downstream speed = 24 / 3 = 8 km/h. Upstream speed = 24 / 6 = 4 km/h. Speed in still water = (8 + 4) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance
Question #2
A person row a distance of 16 km downstream in 2 hours and the same distance upstream in 4 hours. What is the speed of the boat in still water?
A. 8 km/h
B. 6 km/h
C. 5 km/h
D. 7 km/h

Correct Answer: Option B


Explanation:
Downstream speed = 16 / 2 = 8 km/h. Upstream speed = 16 / 4 = 4 km/h. Speed in still water = (8 + 4) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A motorboat registers a speed of 15 km/h in still water. It takes 4 hours to cover a certain distance upstream. If the stream velocity is 3 km/h, find the distance covered.
A. 48 km
B. 56 km
C. 52 km
D. 44 km

Correct Answer: Option A


Explanation:
Upstream speed = 15 - 3 = 12 km/h. Distance = Upstream speed * Time = 12 * 4 = 48 km.

This question belongs to: Maths Time Speed and Distance