SOLUTION: charlie rides her bike at 5 miles per hour her sister leaves 15 minutes later at 8 miles per hour how long will it take her sister to catch up to her
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Question 287881: charlie rides her bike at 5 miles per hour her sister leaves 15 minutes later at 8 miles per hour how long will it take her sister to catch up to her Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! r*t=d
5*1/4=5/4 miles
8-5=3
sister is gaining on charlie at 3 miles an hour. How long will it take her to go 5/4 at 3 miles an hour
r*t=d
3*t=5/4
t=5/4*1/3=5/12*60=25 minutes
