Question

A car travels for half of its time at 80 km/h and for the rest time at 40 km/h. total distance covered is 60 km. what is the average speed of the car​

Answer 1

Answer:

time taken to cover half distance with speed 80=distance /time

(1/2*60)/80=3/8hours

time taken to cover half distance with speed 40=30/40=3/4

average speed =total distance /time

=60/(3/8+3/4)=53.3

Explanation: