A man covers 1/3 of his total journey at 40 km/h and the remaining 2/3 at 80 km/h. Find his average speed for the entire journey. MCQ with Answer and Explanation
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Question #1
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A cyclist tracks 1200 meters in exactly 4 minutes. Find his speed index in km/h.
Correct Answer: Option D
Explanation:
Time = 4 minutes = 240 seconds. Speed = 1200 / 240 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
Time = 4 minutes = 240 seconds. Speed = 1200 / 240 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Two trains 120 meters and 130 meters long are running in opposite directions at speeds of 45 km/h and 45 km/h respectively. In what time will they cross each other?
Correct Answer: Option A
Explanation:
Total distance = 120 + 130 = 250 meters. Relative speed in opposite directions = 45 + 45 = 90 km/h = 25 m/s. Time taken = 250 / 25 = 10 seconds.
Total distance = 120 + 130 = 250 meters. Relative speed in opposite directions = 45 + 45 = 90 km/h = 25 m/s. Time taken = 250 / 25 = 10 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A cyclist covers 600 meters in 2 minutes. What is his speed in km/h?
Correct Answer: Option D
Explanation:
Time = 2 minutes = 120 seconds. Speed = 600 / 120 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
Time = 2 minutes = 120 seconds. Speed = 600 / 120 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
This question belongs to:
Maths
Time Speed and Distance
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