Question 382304
henry runs at a speed of 10mph and doug at a speed of 8mph
 henry gives doug a half mile head start. how long will it take henry to catch doug?
:
You can do this in your head, their relative speed: 10 - 8 = 2mph
:
How long will it take to cover .5 mile at 2mph
:
Time = Dist/speed: {{{.5/2}}} = .25 hrs or 15 min
:
:
We d catches h, they will have traveled the same dist:
8(.25) + .5 = 2.5 mi
10(.25) + 2.5 mi