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anonymous
 5 years ago
pipe A can fill a tank in 4 hours. pipe B can fill in 9 hours less then the time it takes pipe C, a drain pipe, to empty the tank. When all 3 pipes are open, it takes 2 hours to fill the tank. How much time is required for pipe C to empty the tank if pipes A and B are closed. CAN SOMEONE SHOW ME THE STEPS FOR IT?
anonymous
 5 years ago
pipe A can fill a tank in 4 hours. pipe B can fill in 9 hours less then the time it takes pipe C, a drain pipe, to empty the tank. When all 3 pipes are open, it takes 2 hours to fill the tank. How much time is required for pipe C to empty the tank if pipes A and B are closed. CAN SOMEONE SHOW ME THE STEPS FOR IT?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Given Pipe A fills tank in 4 hours Pipe C empties tank in C hours Pipe B fills tank in C9 hours  this means that every hour Pipe A filles 1/4 of tank Pipe C empties 1/c of tank Pipe B fills 1/(c9) of tank When all pipes are open (ie working together) they fill the tank in 2 hours soo..... "every hour", working together 1/2 the tank is filled. Pipe A + pipe B Pipe C = \[C=\frac{1}{4}+\frac{1}{c9}\frac{1}{c}=\frac{1}{2} \]\[\frac{1}{c9}\frac{1}{c}=\frac{1}{2}\frac{1}{4}=\frac{1}{4}\] Subtract 1/4 from both side

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thank You very much. So what would be the final answer?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\frac{c}{c*(c9}\frac{c9}{(c9)*c}=\frac{1}{4}\]get common denominator\[\frac{c(c9)}{c*(c9)}=\frac{1}{4}\]\[\frac{9}{c ^{2}(9 \times c)}=\frac{1}{4}\]combine and distribute terms\[36=c ^{2}9c\]\[0=c ^{2}(9 \times c) 36\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0factor 0=(c12)*(c+3) so c=12, or c=3, since solution must be positive c=3 is extraneous answer: c=12  You could use use quadratic solution, a=1,b=9, c=36 \[ c=\frac{\sqrt{(9)^{2}(4\times 1\times(36)}}{2 \times 1}\]or \[c=\frac{9\sqrt{(9)^{2}(4 \times 1 \times(36) }}{2 \times 1}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry my computer go so slow an I can answer u either

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh wow ur a God. its all good thank u very much for helping me out. :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0when I been working ,if I answer you , I will lost every thing and I have restart over again

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Together Maria and Johannes can pick a bushel of apples in 16 min. Maria takes 4 min. more to pick a bushel than johannes does. Find the time it takes each person to pick a bushel of apples alone?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0give me time to working on it , and renember I anable your question when I been typeing

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0its cool thank you very much for doing this... its my first time and im stoked that i can find help!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0can we go anothe page can ca get more medal?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0u don't have to write all just post hi and i know how answer
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