SOLUTION: David and his sister are 24 miles apart. They start biking toward one another. David rides at a rate of 8 mph and his sister rides at a rate of 12 miles per hour. How long befo

SOLUTION: David and his sister are 24 miles apart. They start biking toward one another. David rides at a rate of 8 mph and his sister rides at a rate of 12 miles per hour. How long befo

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Question 244643: David and his sister are 24 miles apart. They start biking toward one another. David rides at a rate of 8 mph and his sister rides at a rate of 12 miles per hour. How long before they meet? How far will each have traveled?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
D=RT
24=(8+12)T
24=20T
T=24/20
T=6/5
T=1.2 HOURS THEY WILL MEET.
8*1.2=9.6 MILES FOR THE SISTER.
12*1.2=14.4 MILES FOR DAVID.
PROOF:
9.6+14.4=24
24=24
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