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A goes from Point Y at a speed of 60 km/...

A goes from Point Y at a speed of 60 km/hr and comes back with a speed of 80 km/hr. What is the average speed (in km/hr)of A for going and coming back?

A

66.66

B

68.57

C

67.33

D

69.43

Text Solution

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The correct Answer is:
B
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