What is his average speed?

Question

Jack drives at 40 mph for an hour, then at 50 mph for an hour.

Answer 1

Hello,

 

The traveling distance is: S= 40mph * 1hr + 50mph * 1hr = 90miles

Travel time is (1+1)= 2 hr

The Average Speed is: V_avr = 90miles / 2hr = 45mph

 

Hope this will help.