A driver spans a highway path of 400 km. If the uniform speed is boosted by 10 km/h, the trip wraps up in 2 hours less. Find the initial speed. MCQ with Answer and Explanation
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Question #1
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A train running at 60 km/h crosses a bridge 200 meters long in 24 seconds. Find the length of the train.
Correct Answer: Option D
Explanation:
Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.
Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A man rows a boat 30 km downstream in 3 hours and returns upstream in 6 hours. Find the speed of the stream.
Correct Answer: Option A
Explanation:
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train 130 meters long passes a platform 270 meters long in 20 seconds. What is the speed of the train in km/h?
Correct Answer: Option A
Explanation:
Total distance = 130 + 270 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Total distance = 130 + 270 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
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