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
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Question #1
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A cyclist covers 500 meters in exactly 1 minute 40 seconds. Find his speed in km/h.
Correct Answer: Option D
Explanation:
Time = 1 minute 40 seconds = 100 seconds. Speed = 500 / 100 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
Time = 1 minute 40 seconds = 100 seconds. Speed = 500 / 100 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A van moves at 45 km/h for 2 hours and then tracks at 55 km/h for the next 3 hours. Find the net average speed for the total route.
Correct Answer: Option A
Explanation:
Distance 1 = 45 * 2 = 90 km. Distance 2 = 55 * 3 = 165 km. Total distance = 255 km. Total time = 5 hours. Average speed = 255 / 5 = 51 km/h.
Distance 1 = 45 * 2 = 90 km. Distance 2 = 55 * 3 = 165 km. Total distance = 255 km. Total time = 5 hours. Average speed = 255 / 5 = 51 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A runner tracks a circular field of circumference 600 meters. If his speed is 14.4 km/h, how many rounds can he complete in 15 minutes?
Correct Answer: Option D
Explanation:
Speed = 14.4 km/h = 14.4 * (5/18) = 4 m/s. Time = 15 minutes = 900 seconds. Total distance wrapped = 4 * 900 = 3600 meters. Number of rounds completed = 3600 / 600 = 6 rounds.
Speed = 14.4 km/h = 14.4 * (5/18) = 4 m/s. Time = 15 minutes = 900 seconds. Total distance wrapped = 4 * 900 = 3600 meters. Number of rounds completed = 3600 / 600 = 6 rounds.
This question belongs to:
Maths
Time Speed and Distance
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