SOLUTION: Left on together, the cold and hot water faucets of a certain bathtub take 5 minutes to fill the tub. If it takes the cold water faucet 15 minutes to fill the tub by itself

Algebra ->  Rational-functions -> SOLUTION: Left on together, the cold and hot water faucets of a certain bathtub take 5 minutes to fill the tub. If it takes the cold water faucet 15 minutes to fill the tub by itself      Log On


   

Question 1054369: Left on together, the cold and hot water faucets of a certain bathtub take
5
minutes to fill the tub. If it takes the cold water faucet
15
minutes to fill the tub by itself, how long will it take the hot water faucet to fill the tub on its own?
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
.
1%2F15+%2B+1%2Fx = 1%2F5.

Solve for x.

1%2Fx = 1%2F5-1%2F15 = 3%2F15+-+1%2F15 = {{2/15}}}.

x = 15%2F2 = 7.5 minutes.

Answer. 7.5 minutes.

Basic joint-work problems were solved for you with detailed explanations in the lessons
    - Using Fractions to solve word problems on joint work,
    - Solving more complicated word problems on joint work,
    - Selected joint-work word problems from the archive
in this site.

Read them and get be trained in solving joint-work problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Rate of work and joint work problems" of the section "Word problems".