A car covers a certain distance in 8 hours at a speed of 50 km/h. What should be its speed to cover the same distance in 5 hours? MCQ with Answer and Explanation
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Question #1
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A train running at 60 km/h crosses a bridge 200 meters long in 24 seconds. Find the length of the train.
Correct Answer: Option D
Explanation:
Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.
Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person walks from his home to his office at 5 km/h and reaches 10 minutes late. If he walks at 6 km/h, he reaches 2 minutes late. Find the distance.
Correct Answer: Option D
Explanation:
Time difference = 10 - 2 = 8 minutes = 8/60 = 2/15 hour. Let distance be d. d / 5 - d / 6 = 2/15 => d / 30 = 2/15 => d = 4 km.
Time difference = 10 - 2 = 8 minutes = 8/60 = 2/15 hour. Let distance be d. d / 5 - d / 6 = 2/15 => d / 30 = 2/15 => d = 4 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train passes a standing man in 10 seconds and a platform 300 meters long in 25 seconds. Find the length of the train.
Correct Answer: Option A
Explanation:
The train takes 25 - 10 = 15 seconds to cover the length of the platform. Speed of the train = 300 / 15 = 20 m/s. Length of the train = Speed * Time to cross the man = 20 * 10 = 150 meters.
The train takes 25 - 10 = 15 seconds to cover the length of the platform. Speed of the train = 300 / 15 = 20 m/s. Length of the train = Speed * Time to cross the man = 20 * 10 = 150 meters.
This question belongs to:
Maths
Time Speed and Distance
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