A man takes 50 minutes to cover a certain distance at a speed of 6 km/hr. If he walks with a.speed of 10 km/hr. he covers the same distance

A man takes 50 minutes to cover a certain distance at a speed of 6 km/hr. If he walks with a.speed of 10 km/hr. he covers the same distance

A. 1 hour

B. 20 minutes

C. 30 minutes 

D. 10 minutes

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