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an object moves from point p to q with an average speed of 60m/s and comes back from point q to p with an average speed of 144km/h . what is the average speed of whole journey in m/s?

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144km/h = 144,000m/3600s = 40 m/s.

V = (60+40)/2 = 50 m/s.

average speed is 48 m/s

144km/h = 144,000m/3600s = 40 m/s.

V = (60+40)/2 = 50 m/s

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