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A motorcycle drives from place AtoB with a uniform speed of 30 km/h and returns from place BtoA with a uniform speed of 20km/h find his average speed.



Let distance from A to B be x.
While, travelling from B to A the motorcycle will cover the same distance.
Time taken from A to B=distance/speed
=x/30 h
Time taken from B to A=distance/speed
=x/20 h
Average speed = Total distance covered/Total time taken
2*12=24 km/h

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