A motor cyclist derives from Ato B with a uniform speed of 30 km per hour and returns back with a speed of 20 km per hour find the average speed
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Answer:
Explanation:
Let the distance be x
total time taken is equal to x/30 + x/20 = 50x/600
total distance = 2x
therefore average speed = total distance/ total time
= 24 km/h
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