A man covers 1/3rd of his journey at 20 km/h and the remaining 2/3rd at 40 km/h. If the total distance is 120 km, find the total time taken for the journey. MCQ with Answer and Explanation
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Question #1
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A person crosses a 500-meter long bridge in 4 minutes. Find his speed in km/h.
Correct Answer: Option D
Explanation:
Time = 4 minutes = 240 seconds. Speed = 500 / 240 = 25/12 m/s. In km/h = (25/12) * (18/5) = 5 * 1.5 = 7.5 km/h.
Time = 4 minutes = 240 seconds. Speed = 500 / 240 = 25/12 m/s. In km/h = (25/12) * (18/5) = 5 * 1.5 = 7.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person covers a distance of 120 km at 30 km/h and another 80 km at 40 km/h. Find his average speed for the full journey.
Correct Answer: Option C
Explanation:
Total distance = 120 + 80 = 200 km. Time 1 = 120 / 30 = 4 hours. Time 2 = 80 / 40 = 2 hours. Total time = 6 hours. Average speed = 200 / 6 = 33.33 km/h.
Total distance = 120 + 80 = 200 km. Time 1 = 120 / 30 = 4 hours. Time 2 = 80 / 40 = 2 hours. Total time = 6 hours. Average speed = 200 / 6 = 33.33 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A person crosses a 600-meter long street in 5 minutes. What is his speed in km/h?
Correct Answer: Option C
Explanation:
Time = 5 minutes = 300 seconds. Speed = 600 / 300 = 2 m/s. Speed in km/h = 2 * (18/5) = 36 / 5 = 7.2 km/h.
Time = 5 minutes = 300 seconds. Speed = 600 / 300 = 2 m/s. Speed in km/h = 2 * (18/5) = 36 / 5 = 7.2 km/h.
This question belongs to:
Maths
Time Speed and Distance
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