Question

a train travelling at 20 km/h and returns with a speed of 40km/h . Calculate the average speed of the train​

Answer 1

Explanation:

20 km/h plus 40 km/h = 60 km/h .avarage is 12.0 km/h

Answer 2

Answer:

30km/h

Explanation:

$\frac{20 + 40}{2} \\ = \frac{60}{2} \\ = 30$