Question

a dump truck travels 70mph for 3 hours, then for 20mph for another 2 hours in the same direction. what is the average speed the car traveled?

Answer 1

the average speed of the car is 170 mph.

Step-by-step explanation:

Given;

initial speed, u = 70 mph

time of motion, t₁ = 3 hours

final speed, v = 20 mph

time of motion, t₂ = 2 hours

The average speed of the car is calculated as;

`v' = (70(3) - 20(2))/(3-2) \\\\v' = 170 \ mph`

Therefore, the average speed of the car is 170 mph.