The speed of two runners are in the ratio 3 : 4. If the first runner takes 36 seconds to complete a loop, how much time does the second runner take? MCQ with Answer and Explanation
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Question #1
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A train 120 meters long crosses a platform 280 meters long in 20 seconds. Find the speed of the train in km/h.
Correct Answer: Option B
Explanation:
Total distance = 120 + 280 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Total distance = 120 + 280 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person walks from home to school at 4 km/h and arrives 5 minutes late. If he runs at 5 km/h, he arrives 4 minutes early. Find the distance.
Correct Answer: Option D
Explanation:
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A boy goes to school at a speed of 3 km/h and returns to his village at a speed of 2 km/h. If he takes 5 hours in all, what is the distance between the school and the village?
Correct Answer: Option B
Explanation:
Let distance be d. d/3 + d/2 = 5 => 5d/6 = 5 => d = 6 km.
Let distance be d. d/3 + d/2 = 5 => 5d/6 = 5 => d = 6 km.
This question belongs to:
Maths
Time Speed and Distance
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