Walking at 7/9 of his baseline typical speed, a courier agent reaches his office terminal 12 minutes late. Find his typical baseline time parameter. MCQ with Answer and Explanation
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Question #1
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A train 150 meters long is running at 72 km/h. How long will it take to completely pass a platform of length 250 meters?
Correct Answer: Option D
Explanation:
Speed of train = 72 * (5/18) = 20 m/s. Total distance to cross platform = 150 + 250 = 400 meters. Time taken = 400 / 20 = 20 seconds.
Speed of train = 72 * (5/18) = 20 m/s. Total distance to cross platform = 150 + 250 = 400 meters. Time taken = 400 / 20 = 20 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A racing car covers a track lap of 5000 meters in 1 minute 40 seconds. Find its speed in km/h.
Correct Answer: Option A
Explanation:
Time = 1 minute 40 seconds = 100 seconds. Speed = 5000 / 100 = 50 m/s. In km/h = 50 * (18/5) = 180 km/h.
Time = 1 minute 40 seconds = 100 seconds. Speed = 5000 / 100 = 50 m/s. In km/h = 50 * (18/5) = 180 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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An athlete loops a regular hexagonal field of side 50 meters. If his speed is 15 km/h, find the time taken to complete one full lap.
Correct Answer: Option C
Explanation:
Perimeter of the hexagonal field = 6 * 50 = 300 meters. Speed = 15 km/h = 15 * (5/18) = 25/6 m/s. Time = Distance / Speed = 300 / (25/6) = 300 * 6 / 25 = 12 * 6 = 72 seconds.
Perimeter of the hexagonal field = 6 * 50 = 300 meters. Speed = 15 km/h = 15 * (5/18) = 25/6 m/s. Time = Distance / Speed = 300 / (25/6) = 300 * 6 / 25 = 12 * 6 = 72 seconds.
This question belongs to:
Maths
Time Speed and Distance
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