A car travels from A to B at the rate of 40 km/h and returns

A car travels from A to B at the rate of 40 km/h and returns from B to A at the rate of 60 km/h. Its average speed during the whole journey is

Here, distance is same.

∴ Average speed =	2xy
	x + y

=		2 × 40 × 60		kmph.
		40 + 60

=		2 × 40 × 60		kmph.
		100

= 48 kmph.