A train passes an electric pole in 12 seconds and a bridge of length 240 meters in 24 seconds. Find the length of the train. MCQ with Answer and Explanation
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Question #1
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A baseline boat hull can row 12 km/h in still water. If the river current tracks a velocity of 4 km/h, find the exact sector distance covered downstream by the boat hull in 45 minutes flat.
Correct Answer: Option B
Explanation:
Downstream speed = 12 + 4 = 16 km/h. Time = 45 minutes = 45/60 = 0.75 hours = 3/4 hour. Distance covered = Speed * Time = 16 * (3/4) = 12 km.
Downstream speed = 12 + 4 = 16 km/h. Time = 45 minutes = 45/60 = 0.75 hours = 3/4 hour. Distance covered = Speed * Time = 16 * (3/4) = 12 km.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A sound wave maps along a valley channel at 330 m/s. How many seconds are required to span a distance length of 9.9 km?
Correct Answer: Option A
Explanation:
Distance = 9.9 km = 9900 meters. Time taken = 9900 / 330 = 30 seconds.
Distance = 9.9 km = 9900 meters. Time taken = 9900 / 330 = 30 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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The speeds of two cars are in the ratio 4 : 3. If they cover the same distance, and the slower car takes 2 hours, how much time does the faster car take?
Correct Answer: Option C
Explanation:
Ratio of speeds = 4:3, so ratio of times taken = 3:4. The slower car corresponds to 4 parts = 2 hours => 1 part = 0.5 hours. Time for the faster car = 3 parts = 3 * 0.5 = 1.5 hours.
Ratio of speeds = 4:3, so ratio of times taken = 3:4. The slower car corresponds to 4 parts = 2 hours => 1 part = 0.5 hours. Time for the faster car = 3 parts = 3 * 0.5 = 1.5 hours.
This question belongs to:
Maths
Time Speed and Distance
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