A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 0.5 minutes. MCQ with Answer and Explanation

Question
A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 0.5 minutes.
A. 10.2 km
B. 12.0 km
C. 11.4 km
D. 9.8 km
Answer: Option A
Solution (By JKSSB Mock Tests)
Time = 0.5 minutes = 30 seconds. Distance = Speed * Time = 340 * 30 = 10200 meters = 10.2 km.
This question belongs to: Maths Time Speed and Distance
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Practice More Time Speed and Distance Questions

Question #1
A train 240 meters long passes a pole in 24 seconds. How long will it take to pass a platform 650 meters long?
A. 114 seconds
B. 100 seconds
C. 89 seconds
D. 65 seconds
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Correct Answer: Option C

Explanation:
Speed of train = 240 / 24 = 10 m/s. Total distance to pass platform = 240 + 650 = 890 meters. Time taken = 890 / 10 = 89 seconds.
This question belongs to: Maths Time Speed and Distance
Question #2
A man can row 8 km/h in still water. If the river current flows at 2 km/h, it takes him 3.2 hours to row to a place and back. How far is the place?
A. 12 km
B. 10 km
C. 14 km
D. 15 km
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Correct Answer: Option A

Explanation:
Downstream speed = 8 + 2 = 10 km/h. Upstream speed = 8 - 2 = 6 km/h. Let distance be d. d / 10 + d / 6 = 3.2 => 16d / 60 = 3.2 => 16d = 192 => d = 12 km.
This question belongs to: Maths Time Speed and Distance
Question #3
A courier covers 40 km of his shift route at 20 km/h and the remaining 60 km at 30 km/h. Find his average speed across the whole shift.
A. 25 km/h
B. 28 km/h
C. 24 km/h
D. 26 km/h
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Correct Answer: Option A

Explanation:
Total distance = 40 + 60 = 100 km. Time for first sector = 40 / 20 = 2 hours. Time for second sector = 60 / 30 = 2 hours. Total time = 4 hours. Average speed = 100 / 4 = 25 km/h.
This question belongs to: Maths Time Speed and Distance
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