A train running at 54 km/h passes an active signal pole in 12 seconds. Find the length of the train. MCQ with Answer and Explanation
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Question #1
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A train passes a static observer in 8 seconds and a platform 120 meters long in 14 seconds. Find the length of the train.
Correct Answer: Option C
Explanation:
Time to cross the platform alone = 14 - 8 = 6 seconds. Speed of train = 120 / 6 = 20 m/s. Length of train = Speed * Time to pass observer = 20 * 8 = 160 meters.
Time to cross the platform alone = 14 - 8 = 6 seconds. Speed of train = 120 / 6 = 20 m/s. Length of train = Speed * Time to pass observer = 20 * 8 = 160 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person covers a distance of 80 km at 20 km/h and another 120 km at 40 km/h. Find his average speed for the whole journey.
Correct Answer: Option D
Explanation:
Total distance = 80 + 120 = 200 km. Total time taken = 80/20 + 120/40 = 4 + 3 = 7 hours. Average speed = 200 / 7 = 28.57 km/h.
Total distance = 80 + 120 = 200 km. Total time taken = 80/20 + 120/40 = 4 + 3 = 7 hours. Average speed = 200 / 7 = 28.57 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A sound wave tracking along a canyon paths at 340 m/s. Find the total distance wrapped by the sound wave in exactly 25 seconds.
Correct Answer: Option D
Explanation:
Distance covered = Speed * Time = 340 * 25 = 8500 meters = 8.5 km.
Distance covered = Speed * Time = 340 * 25 = 8500 meters = 8.5 km.
This question belongs to:
Maths
Time Speed and Distance
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