A train passes a standing man in 10 seconds and a platform 300 meters long in 25 seconds. Find the length of the train. MCQ with Answer and Explanation
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Question #1
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A car covers a distance of 120 km at 40 km/h and another 180 km at 60 km/h. Find the average speed for the complete trip.
Correct Answer: Option C
Explanation:
Total distance = 120 + 180 = 300 km. Time 1 = 120 / 40 = 3 hours. Time 2 = 180 / 60 = 3 hours. Total time = 6 hours. Average speed = 300 / 6 = 50 km/h.
Total distance = 120 + 180 = 300 km. Time 1 = 120 / 40 = 3 hours. Time 2 = 180 / 60 = 3 hours. Total time = 6 hours. Average speed = 300 / 6 = 50 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Two distinct points A and B are 100 km apart on a highway. One car starts from A and another from B at the same time. If the cars travel in the same direction at constant speeds, they meet in 5 hours. If they travel towards each other, they meet in 1 hour. What is the speed of the faster car?
Correct Answer: Option A
Explanation:
Let speeds be x and y (x > y). Same direction relative speed = x - y = 100 / 5 = 20 km/h. Opposite direction relative speed = x + y = 100 / 1 = 100 km/h. Adding equations: 2x = 120 => x = 60 km/h.
Let speeds be x and y (x > y). Same direction relative speed = x - y = 100 / 5 = 20 km/h. Opposite direction relative speed = x + y = 100 / 1 = 100 km/h. Adding equations: 2x = 120 => x = 60 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train passes a standing person on a platform in 8 seconds and crosses the platform itself, which is 240 meters long, in 20 seconds. Find the length of the train.
Correct Answer: Option D
Explanation:
Time taken to cross the platform distance alone = 20 - 8 = 12 seconds. Speed of the train = 240 / 12 = 20 m/s. Length of the train = Speed * Time to pass the person = 20 * 8 = 160 meters.
Time taken to cross the platform distance alone = 20 - 8 = 12 seconds. Speed of the train = 240 / 12 = 20 m/s. Length of the train = Speed * Time to pass the person = 20 * 8 = 160 meters.
This question belongs to:
Maths
Time Speed and Distance
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