SOLUTION: A boy swims downstream 0.9 miles in the same amount of time that he can swim 0.6 miles upstream. If the rate of the current is 1.5 mph, how fast can he swim in still water?

Question 205999: A boy swims downstream 0.9 miles in the same amount of time that he can swim 0.6 miles upstream. If the rate of the current is 1.5 mph, how fast can he swim in still water?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
D=RT OR T=D/R
T=.9/(R+1.5)
T=.6/(R-1.5)
.9/(R+1.5)=.6/(R-1.5)
.6(R+1.5)=.9(R-1.5)
.6R+.9=.9R-1.35
.6R-.9R=-1.35-.9
-.3R=-2.25
R=-22.5/-.3
R=7.5 MPH IS HIS QWIMMING SPEED IN STILL WATER.
PROOF:
.9/(7.5+1.5)=.6/(7.5-1.5)
.9/9=.6/6
.1=.1
RELATED QUESTIONS
A boy swims downstream 0.9 miles in the same amount of time that he can swim 0.6 miles... (answered by checkley77,richwmiller)

A boy swims downstream 0.9 miles in the same amount of time that he can swim 0.6 miles... (answered by ankor@dixie-net.com)

A fisherman on the river rows 9 miles downstream in the same amount of time he rows 3... (answered by nerdybill)

Your help is greatly appreciated. Here is my problem: A boy can drive a... (answered by AnlytcPhil)

A boat can travel 9 miles upstream in the same amount of time it takes to travel 11 miles (answered by solver91311,nyc_function)

This is a Rational Word Problem but i think it still goes under this category. The word... (answered by josmiceli,solver91311)

a boat can travel a 9 minles upstream in the same time amount of time it takes to travel... (answered by venugopalramana)

I am having a hard time figuring this word problem out. Can you please help. Upstream,... (answered by Fombitz,stanbon)

Junior's boat will go 15 miles per hour in still water. If he can go 12 miles downstream (answered by Nate,mathdude2)