Question

A motor cyclist drives from A to B with a uniform speed of 30km/h and returns back with a speed of 20km/h. Find its average speed

Answer 1

Hi friend,

# 24 km/hr
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➡Solution :-

Let , the distance between A and B is D

Then , Time taken by the driver with uniform speed at 30km/h

➡T1 = Distance / speed = D/30km/h

➡In same way , when he returns with an uniform speed at 20km/h . Then ,

T2 = D/20km/h

■Avg. Speed = Total Distance/Total time taken

➡Therefore ,

=> ( D+D)/(D/30 + D/20) km/h

Or , 2 ×30×20 / (30+20) km/h

Or, 24km/h ( proved)...i hope it helps you
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