Help:
My friend sets out walking at a speed of 3 miles per hour. I set out behind her 5 minutes later at 4 miles per hour.
When I start walking, how many miles has my friend traveled?
+1491 If she walks for 5 mins (.083 hours) before your start then if you multiply that time by her rate (3 miles / hour), thus canceling out the unit of hours and leaving you with miles then she actually walked... .249 miles!
HAZZA! :D
