A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 10 seconds. MCQ with Answer and Explanation
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Question #1
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A train 160 meters long completely passes a static pole in 8 seconds. Find its speed in km/h.
Correct Answer: Option C
Explanation:
Speed = 160 / 8 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Speed = 160 / 8 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A wheel of diameter 70 cm makes 400 revolutions per minute. Find the speed of the vehicle in km/h.
Correct Answer: Option B
Explanation:
Radius r = 35 cm = 0.35 meters. Circumference = 2 * (22/7) * 0.35 = 2.2 meters. Distance covered in 1 minute = 400 * 2.2 = 880 meters. Distance covered in 1 hour = 880 * 60 = 52800 meters = 52.8 km. Speed = 52.8 km/h.
Radius r = 35 cm = 0.35 meters. Circumference = 2 * (22/7) * 0.35 = 2.2 meters. Distance covered in 1 minute = 400 * 2.2 = 880 meters. Distance covered in 1 hour = 880 * 60 = 52800 meters = 52.8 km. Speed = 52.8 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A slow moving truck covers a distance of 210 km at a uniform speed of 35 km/h. How much time does it take?
Correct Answer: Option D
Explanation:
Time taken = Distance / Speed = 210 / 35 = 6 hours.
Time taken = Distance / Speed = 210 / 35 = 6 hours.
This question belongs to:
Maths
Time Speed and Distance
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