Question

A truck covers a certain distance in 12 hours at the speed of 70km/hr . What is the average speed of a car which travels a distance of 120 km more than the truck in the same time ?
A. 56km/hr.
B. 75km/hr.
C. 82 km/hr.
D. None of these

Answer 1

Correct Answer - D
Distance covered by truck in 12 hours
= speed `xx` time = `70 xx 12 = 840`
Distance covered by car in 12 hours
= (840 + 120) = 960 km
Average speed of car = `("Distance covered")/("time taken")`
`= ((960)/(12)) = 80` km/hr