Question

A car travels at a speed of 30 m.p.h for the first 40 miles then at a speed of 35 m.p.h. for the next 40 miles then at a speed 40 mph for the next 40 miles again at a speed at 38 m.p.h. for the next 40 miles again at a speed of 35 m.p.h. for the next 40 miles what is the average speed of the car at its journey in answer

Answer 1

Speed= 30mph                       Distance=40 miles
Speed= 35mph                       Distance=40 miles
Speed= 40mph                       Distance=40 miles
Speed= 38mph                      Distance=40 miles
Average speed= (30+35+40+38)/4
=143/4
=35.75 mph