Question

a motorcyclist drive from a and b with a uniform speed 30 km per hour return back with a speed of 20 km per hour .find its average speed

Answer 1

in going 30km/h=30km in 1 hour
in returning 20km/h=20 km in 1 hour
so.

A and B distance in going=30×1=30km
in returning =20×1=20km
Total distance=20+30=50km
TOTAL time1+1=2hours
average speed=50/2=25km/h

Answer 2

Answer:

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