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

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

A. 11.4 km

B. 12.0 km

C. 9.8 km

D. 10.2 km

Answer: Option D

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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Question #1 Report Error

A runner covers 100 meters in 11 seconds. Find his approximate speed in km/h.

A. 32.7 km/h

B. 34.2 km/h

C. 30.5 km/h

D. 36.0 km/h

Correct Answer: Option A

Explanation:
Speed = 100 / 11 m/s. In km/h = (100 / 11) * (18/5) = 360 / 11 = 32.72 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2 Report Error

A train 150 meters long passes a pole in 7.5 seconds. What is the speed of the train in km/h?

A. 64 km/h

B. 80 km/h

C. 72 km/h

D. 84 km/h

Correct Answer: Option C

Explanation:
Speed of train = 150 / 7.5 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3 Report Error

A train 300 meters long crosses a platform of length 600 meters in 45 seconds. What is the speed of the train in km/h?

A. 72 km/h

B. 60 km/h

C. 90 km/h

D. 80 km/h

Correct Answer: Option A

Explanation:
Total distance = 300 + 600 = 900 meters. Speed = 900 / 45 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance