A sound wave covers a distance of 1.7 km in 5 seconds. What is the speed of sound in m/s? MCQ with Answer and Explanation

A sound wave covers a distance of 1.7 km in 5 seconds. What is the speed of sound in m/s?
A. 350 m/s
B. 360 m/s
C. 340 m/s
D. 320 m/s
Answer: Option C
Solution (By JKSSB Mock Tests)
Distance = 1.7 km = 1700 meters. Speed = Distance / Time = 1700 / 5 = 340 m/s.

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Practice More Time Speed and Distance Questions

Question #1
A boatman rows 24 km downstream and 12 km upstream, taking 2 hours for each leg of the journey. Find the speed of the boat in still water.
A. 11 km/h
B. 9 km/h
C. 8 km/h
D. 10 km/h

Correct Answer: Option B


Explanation:
Downstream speed = 24 / 2 = 12 km/h. Upstream speed = 12 / 2 = 6 km/h. Speed in still water = (12 + 6) / 2 = 9 km/h.

This question belongs to: Maths Time Speed and Distance
Question #2
A locomotive train 140 meters long passes a track milestone pole in 7 seconds flat. What is its speed in km/h?
A. 80 km/h
B. 72 km/h
C. 68 km/h
D. 76 km/h

Correct Answer: Option B


Explanation:
Speed of train = 140 / 7 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A theft is reported at 4:00 AM. The thief runs at 50 km/h. The police begin chasing at 4:30 AM at 60 km/h. Find the distance from the starting point where the thief is caught.
A. 180 km
B. 200 km
C. 120 km
D. 150 km

Correct Answer: Option D


Explanation:
In 30 minutes (0.5 hours), the thief covers 50 * 0.5 = 25 km. Relative speed = 60 - 50 = 10 km/h. Time taken to catch = 25 / 10 = 2.5 hours. Distance covered by police = 60 km/h * 2.5 hours = 150 km.

This question belongs to: Maths Time Speed and Distance