SOLUTION: Tom bikes 15 km/hr faster than Bill. By the time it takes Tom to ride 80 km, Bill has ridden 50 km. Find the speed of each biker.

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Question 532122: Tom bikes 15 km/hr faster than Bill. By the time it takes Tom to ride 80 km, Bill has ridden 50 km. Find the speed of each biker.
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
Tom bikes 15 km/hr faster than Bill.
In the time it takes Tom to bike 80 km, Bill has ridden 50 km.
So, Tom is 30 km ahead of Bill.
That means he has been riding 30 km/15 km/hr = 2 hr to get that far ahead.
Tom's rate is 80 km/ 2 hr = 40 km/hr
Bill's rate is 50 km / 2 hr = 25 km/hr