Question

a man covers a certain distance with speed 50 km/hr what should be his returning speed so that the average speed is 60 km/hr

Answer 1

Answer:

The returning speed must be 70 km/hr so that the average speed is 60 km/hr.

Explanation:

Let the going speed be V1

and, returning speed be V2

We know that,

Average speed = V1 + V2 / 2

60 = 50 + V2 / 2

=> 120 = 50 + V2 => V2 = 120 - 50 = 70.

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