A car covers the distance from Delhi to Gurugram at 60 km/h and returns at a uniform speed of 40 km/h. The average speed of the car during the whole journey is:

When a certain distance is covered at a speed of xkm/h and the same distance is covered back at a speed of ykm/h, the average speed for the entire journey is given by the formula:
Average Speed=
x+y
2xy
​

Given:
x=60km/h
y=40km/h

Substituting the values into the formula:

Average Speed=
60+40
2×60×40
​
=
100
4800
​
=48km/h