Question

a person moves from Cuttack to Puri with a speed of 70 kilometre per hour and returns back with a speed of 30 kilometre per hour then calculate is velocity and speed​

Answer 1

Let the distance be x

Now, speed=distance/time

70km/hr=x/t1

t1=x/70

Then30km/hr=x/t2

t2=x/30

Now, average speed=total distance/total time

=(x+x)/(x/70+x/30)

2x/(10x/210)

2x×210/10x

42km/hr=avg speed

HOPE IT HELPS.