A man walks at a speed of 5 km/hr for 20 minutes. He runs back the same distance at a speed of 20 km/h. How much time does he take to run back?

20 minutes

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80 minutes

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10 minutes

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5 minutes

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Solution

The correct option is D 5 minutes
Distance walked by the man = Speed $\times$ Time = 5 km\hr $\times$ 20 min
Given that the man runs back the same distance. Let 't' be the time taken by the man. Then,
5 km\hr $\times$ 20 min = 20 km\hr $\times$ t
Therefore, $t = \frac{5 \times 20}{20}$ = 5 minutes

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A man walks at a speed of 5 km/hr for 20 minutes. He runs back the same distance at a speed of 20 km/h. How much time does he take to run back?

The correct option is D 5 minutesDistance walked by the man = Speed × Time = 5 km\hr × 20 min Given that the man runs back the same distance. Let 't' be the time taken by the man. Then, 5 km\hr × 20 min = 20 km\hr × t Therefore, t=5×2020 = 5 minutes

The correct option is D 5 minutes
Distance walked by the man = Speed $\times$ Time = 5 km\hr $\times$ 20 min
Given that the man runs back the same distance. Let 't' be the time taken by the man. Then,
5 km\hr $\times$ 20 min = 20 km\hr $\times$ t
Therefore, $t = \frac{5 \times 20}{20}$ = 5 minutes