Question

A car travels 30km at a uniform speed of 40km/h and the next 30kmat a uniform speed of 20km/h. Find its average speed.

Answer 1

the formula to find the average is a/n where 'a' is the total of observations and 'n' is the number of observations so :-
(40+20)/2
=60/2
=30
so the average speed for the whole journey was 30 km/h