Question

A car covers a certain distance in three hours at the speed of 62km/hr. What is the average speed of a truck which travels at a distance of 120km less than the car in the same time

Answer 1

the answer is 40 km/hr

Answer 2

Speed = distance /time
Distance = speed x time
               = 62 x 3
               = 186 km
Distance to be traveled by the truck = 186 - 120
                                                         = 66 km     
Speed = distance/time
           = 66/3
           = 22 km/h
Avg. speed = 66/3
                   = 22 km/h