Question

A car is moving on a straight road covers one third of the distance with the speed of 20km/hr and rest with speed of 60km/w.The average speed is

Answer 1

Answer:

Explanation:

let distance =x

1/3 x distanc ecovrd with 20km/hr ,so time t1=1/3*x/*1/60+9020

2/3x covered with 60 km/hr ,t2=2/3*x1/60

so avg speed= total distance travelled/time taken

       90*60/90+60=36 km/hr