A train 120 meters long running at 54 km/h passes a standing pedestrian. Find the time taken to cross. MCQ with Answer and Explanation
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Question #1
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A motorist covers a distance of 180 km at 45 km/h and returns at 60 km/h. Find the total time spent for the entire round trip.
Correct Answer: Option A
Explanation:
Time for outward journey = 180 / 45 = 4 hours. Time for return journey = 180 / 60 = 3 hours. Total time = 4 + 3 = 7 hours.
Time for outward journey = 180 / 45 = 4 hours. Time for return journey = 180 / 60 = 3 hours. Total time = 4 + 3 = 7 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A sound wave travels at 340 m/s. How much distance in kilometers does it cover in 20 seconds?
Correct Answer: Option B
Explanation:
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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Two trains of equal length cross a pole in 10 seconds and 20 seconds respectively. If the length of each train is 100 meters, find the time taken by them to pass each other when running in opposite directions.
Correct Answer: Option C
Explanation:
Speed of first train = 100 / 10 = 10 m/s. Speed of second train = 100 / 20 = 5 m/s. Total distance to cross = 100 + 100 = 200 meters. Relative speed in opposite directions = 10 + 5 = 15 m/s. Time taken = 200 / 15 = 13.33 seconds.
Speed of first train = 100 / 10 = 10 m/s. Speed of second train = 100 / 20 = 5 m/s. Total distance to cross = 100 + 100 = 200 meters. Relative speed in opposite directions = 10 + 5 = 15 m/s. Time taken = 200 / 15 = 13.33 seconds.
This question belongs to:
Maths
Time Speed and Distance
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