SOLUTION: Sally and betty are both leaving the grocery store to go to Sally's house. Sally leaves 40 seconds before betty. Sally travels on her bike at a pace of 8 feet per second. Betty

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Question 905595: Sally and betty are both leaving the grocery store to go to Sally's house. Sally leaves 40 seconds before betty. Sally travels on her bike at a pace of 8 feet per second. Betty travels at a pace of 12 feet per second. At what time will Sally and Betty be the same distance from the grocery store.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Gaining speed 12 -8= 4f/s
Headstart 8*40 =320 ft
Time to catch up 320/4=80 sec
Algebraic solution
8(t+40)=12t
8t+320=12t
320=12t-8t
320=4t
t=80 sec
Distance to meeting 80*12=960 ft