The speeds of two cars are in the ratio 4 : 3. If they cover the same distance, and the slower car takes 2 hours, how much time does the faster car take? MCQ with Answer and Explanation
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Question #1
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A commuter train passes a standing track post in 6 seconds flat. If the length of the train is 150 meters, find its speed in km/h.
Correct Answer: Option C
Explanation:
Speed = 150 / 6 = 25 m/s. In km/h = 25 * (18/5) = 90 km/h.
Speed = 150 / 6 = 25 m/s. In km/h = 25 * (18/5) = 90 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Walking at 6/7 of his usual speed, a man reaches his destination 10 minutes late. What is his usual time to reach the destination?
Correct Answer: Option D
Explanation:
New speed = 6/7 of usual speed => New time = 7/6 of usual time. Difference = 1/6 of usual time = 10 minutes. Usual time = 10 * 6 = 60 minutes.
New speed = 6/7 of usual speed => New time = 7/6 of usual time. Difference = 1/6 of usual time = 10 minutes. Usual time = 10 * 6 = 60 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A car travels a distance of 420 km at a certain speed. If the speed is increased by 15 km/h, it takes 5 hours for the journey. Find the original speed.
Correct Answer: Option B
Explanation:
New speed = 420 / 5 = 84 km/h. Since new speed is original speed + 15 km/h, the original speed = 84 - 15 = 69 km/h.
New speed = 420 / 5 = 84 km/h. Since new speed is original speed + 15 km/h, the original speed = 84 - 15 = 69 km/h.
This question belongs to:
Maths
Time Speed and Distance
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