SOLUTION: Joe's boat can travel 15 miles upstream and 15 miles downstream in a total of 4 hours. If the speed of the current is 5 mph, what is the speed of boat in still water?
equation
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Question 630957: Joe's boat can travel 15 miles upstream and 15 miles downstream in a total of 4 hours. If the speed of the current is 5 mph, what is the speed of boat in still water?
equation for this problem and how you get it?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
R*t=d
(r+ c)*(t)=15;
(r-c)*(4-t)=15;
c=5, r = 10, t = 1
time equals one hour with current
three hours against current
check
15*1=15
5*3=15
ok
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