Question

A car travels from a to b with a speed of 40km/h and returns back with a speed of 50 km/h . Find its average speed over the journey

Answer 1

Answer:

44.4km/hr

Explanation:

Let's consider

Speed 1 s1 = 40km/hr

Speed 2 s2 = 50km/hr.

Average speed =

$\frac{2s1s2 }{s1 + s2}$

$\frac{2 \times 40 \times 50}{40 + 50}$

$\frac{4000}{90}$

44.4 km/hr