Two express trains 200 meters and 150 meters long are moving in the same direction at 72 km/h and 54 km/h respectively. Find the time taken by the faster train to cross the slower train completely. MCQ with Answer and Explanation
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Question #1
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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
Question #2
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A student walking at 3 km/h reaches his school 15 minutes late. If he walks at 4 km/h, he reaches 15 minutes early. Find the distance.
Correct Answer: Option A
Explanation:
Time difference = 15 - (-15) = 30 minutes = 0.5 hours. Let distance be d. d/3 - d/4 = 0.5 => d/12 = 0.5 => d = 6 km.
Time difference = 15 - (-15) = 30 minutes = 0.5 hours. Let distance be d. d/3 - d/4 = 0.5 => d/12 = 0.5 => d = 6 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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If a student walks from his house to school at 5 km/h, he is late by 10 minutes. However, if he walks at 6 km/h, he is late by only 2 minutes. Find the distance between his house and school.
Correct Answer: Option D
Explanation:
Time difference = 10 - 2 = 8 minutes = 8/60 hour = 2/15 hour. Let distance be d. d/5 - d/6 = 2/15 => d/30 = 2/15 => d = 60/15 = 4 km.
Time difference = 10 - 2 = 8 minutes = 8/60 hour = 2/15 hour. Let distance be d. d/5 - d/6 = 2/15 => d/30 = 2/15 => d = 60/15 = 4 km.
This question belongs to:
Maths
Time Speed and Distance
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