Question

car travels from a to b at 60 km /hr and returns at A at 90 km /hr.what is its average velocity and speed

Answer 1

EXPLANATION:-

For average velocity

The average velocity will be zero because the displacement is zero

For average speed

We know average speed=$\sf\;\frac{2v_1v_2}{v_1+v_2}$

$\sf\;v_1=60\;km/hr\\v_2=90\;km/hr$

Average speed=(2×60×90)/(60+90)

Average speed=10800/150

Average speed=72 km/hr