Question

A car covers 1/3distance with speed 20 km/h and 2/3 with 60km/h average speed is..​

Answer 1

Answer:

Total distance=2/3+1/3 =3/3 =1

t1=distance1/time =2/3÷60=1/90h

t2=1/3÷20=1/60 h

Total time=1/90+1/60=5/180=1/36

Average speed=total distance/total time

=1/1/36=36km/h

Answer 2

Answer:

The average speed is 27.7 Km/h