Question

9. One car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60
km/hr. The average speed is
(a) 40 km/hr
(b) 80 km/hr (c) 46 km/hr
(d) 36 km/hr
​

Answer 1

Explanation:

for m/S ..... multiplying by 5/18