Mathematics, 01.07.2019 12:30, suewignall

Acar moves from a to b at a speed of 50 km/hr and comes back from b to a at a speed of 30 km/hr. find its average speed during the journey.

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Acar moves from a to b at a speed of 50 km/hr and comes back from b to a at a speed of 30 km/hr. fin...