A motor car covers `1/3`rd part of total distance with `v_(1) = 10km//hr` , second `1/3`rd part with `v_(2) = 20km//hr` and rest `1/3`rd part with `v_(3) = 60km //hr` What is the average speed of the car?

Options

A. 18 km/hr
B. 45 km/hr
C. 6 km/hr
D. 22.5 km/hr

Answer

A