A sprinter tracks a 100-meter course in 10 seconds, while the runner-up completes it in 11 seconds. By what distance does the winner beat the runner-up? MCQ with Answer and Explanation
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Question #1
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A car climbs a hill at 24 km/h and descends the same hill at 36 km/h. Find the average speed of the car for the entire journey.
Correct Answer: Option B
Explanation:
Average Speed = (2 * 24 * 36) / (24 + 36) = 1728 / 60 = 28.8 km/h.
Average Speed = (2 * 24 * 36) / (24 + 36) = 1728 / 60 = 28.8 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A jogger covers a distance of 18 km in 2 hours. If he runs at 1.5 times his original speed, how much time will he take to cover a distance of 27 km?
Correct Answer: Option A
Explanation:
Original speed = 18 / 2 = 9 km/h. New speed = 1.5 * 9 = 13.5 km/h. Time needed for 27 km = 27 / 13.5 = 2 hours.
Original speed = 18 / 2 = 9 km/h. New speed = 1.5 * 9 = 13.5 km/h. Time needed for 27 km = 27 / 13.5 = 2 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A private sedan tracks a sector path length of 480 km in 5 hours 20 minutes. Find its mean average speed index.
Correct Answer: Option D
Explanation:
Time = 5 hours 20 minutes = 5 + 20/60 = 5.333 hours = 16/3 hours. Speed index = Sector Distance / Time = 480 / (16/3) = 480 * 3 / 16 = 30 * 3 = 90 km/h.
Time = 5 hours 20 minutes = 5 + 20/60 = 5.333 hours = 16/3 hours. Speed index = Sector Distance / Time = 480 / (16/3) = 480 * 3 / 16 = 30 * 3 = 90 km/h.
This question belongs to:
Maths
Time Speed and Distance
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