Question

A car drives for 3 hours at 40 mph, and then drives 300 miles at 60 mph. what is the car's average speed, in mph?

Answer 1

52.5 mph

Step-by-step explanation:

part 1,

speed=40mph

distance= 40×3=120 miles

time= 3 hours

part 2

speed= 60mph

distance= 300 miles

time= 300÷60= 5hours

Average speed= (300+120)÷(5+3) = 52.5mph