A sound wave maps a total line segment distance of 2.04 km in 6 seconds. Find the velocity of sound in m/s. MCQ with Answer and Explanation
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Question #1
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In a 400-meter race, A finishes in 44 seconds and B finishes in 50 seconds. By what distance does A beat B?
Correct Answer: Option A
Explanation:
Speed of B = 400 / 50 = 8 m/s. Distance covered by B when A crosses the finish line at 44 seconds = 8 * 44 = 352 meters. Winning margin = 400 - 352 = 48 meters.
Speed of B = 400 / 50 = 8 m/s. Distance covered by B when A crosses the finish line at 44 seconds = 8 * 44 = 352 meters. Winning margin = 400 - 352 = 48 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A vehicle covers a certain distance at 48 km/h in 5 hours. How much time will it take to cover the same distance at 60 km/h?
Correct Answer: Option A
Explanation:
Distance = 48 * 5 = 240 km. New time required = 240 / 60 = 4 hours.
Distance = 48 * 5 = 240 km. New time required = 240 / 60 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A scooter travels from town P to town Q at 30 km/h and returns at 45 km/h. Find the net average speed for the round journey.
Correct Answer: Option B
Explanation:
Average Speed = 2xy / (x + y) = (2 * 30 * 45) / (30 + 45) = 2700 / 75 = 36 km/h.
Average Speed = 2xy / (x + y) = (2 * 30 * 45) / (30 + 45) = 2700 / 75 = 36 km/h.
This question belongs to:
Maths
Time Speed and Distance
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