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. MCQ with Answer and Explanation
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Question #1
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A boatman can row 16 km/h in still water. If the river velocity index tracks at 4 km/h, find the time interval required by the boat hull to row 48 km upstream.
Correct Answer: Option A
Explanation:
Upstream tracking speed = 16 - 4 = 12 km/h. Time required = Sector Distance / Upstream Speed = 48 / 12 = 4 hours.
Upstream tracking speed = 16 - 4 = 12 km/h. Time required = Sector Distance / Upstream Speed = 48 / 12 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train passes a 110-meter long bridge in 12 seconds and a standard sign post in 7 seconds. Find the length of the train.
Correct Answer: Option B
Explanation:
Time taken to cross the bridge alone = 12 - 7 = 5 seconds. Speed of train = 110 / 5 = 22 m/s. Length of train = Speed * Time to cross sign post = 22 * 7 = 154 meters.
Time taken to cross the bridge alone = 12 - 7 = 5 seconds. Speed of train = 110 / 5 = 22 m/s. Length of train = Speed * Time to cross sign post = 22 * 7 = 154 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A delivery coach covers a path of 210 km in 3 hours 30 minutes. What should be its speed to wrap the same distance in exactly 3 hours?
Correct Answer: Option A
Explanation:
Required speed = Distance / Time = 210 / 3 = 70 km/h.
Required speed = Distance / Time = 210 / 3 = 70 km/h.
This question belongs to:
Maths
Time Speed and Distance
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