A train 140 meters long is running at 90 km/h. How long will it take to pass a platform of length 210 meters? MCQ with Answer and Explanation
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Question #1
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A boat can row 15 km/h in still water. If the river current flows at 5 km/h, find the total time taken by the boat to row 40 km upstream.
Correct Answer: Option B
Explanation:
Upstream speed = 15 - 5 = 10 km/h. Time taken = Distance / Upstream speed = 40 / 10 = 4 hours.
Upstream speed = 15 - 5 = 10 km/h. Time taken = Distance / Upstream speed = 40 / 10 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train passes a static milepost in exactly 7 seconds. If the speed of the train is 72 km/h, find the absolute length of the train.
Correct Answer: Option A
Explanation:
Speed of train = 72 * (5/18) = 20 m/s. Length of train = Speed * Time = 20 * 7 = 140 meters.
Speed of train = 72 * (5/18) = 20 m/s. Length of train = Speed * Time = 20 * 7 = 140 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A person runs around a square track of side 60 meters. If his speed is 12 km/h, how much time does he take to complete one round?
Correct Answer: Option D
Explanation:
Perimeter of the track = 4 * 60 = 240 meters. Speed = 12 km/h = 12 * (5/18) = 10/3 m/s. Time required = Distance / Speed = 240 / (10/3) = 240 * 3 / 10 = 72 seconds.
Perimeter of the track = 4 * 60 = 240 meters. Speed = 12 km/h = 12 * (5/18) = 10/3 m/s. Time required = Distance / Speed = 240 / (10/3) = 240 * 3 / 10 = 72 seconds.
This question belongs to:
Maths
Time Speed and Distance
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