Question

Two children run in opposite directions. One runs at a speed of 4 mph while the other runs at 6 mph. How long will it take before they are 5 miles apart?

Answer 1

as both are running in the opposite direction so the relative speed will be 4+6 = 10mph

the distance is 5 miles

the time to cover the distance is

t = 5/10

t= 1/2

t = 0.5 hrs or 30 minutes