If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
Math time who can help me solve this (read I suck at math this is really easy for some. I have no idea how to start, I just need the algorithm not the answer, I'd like to do something for myself. )
An inlet pipe can fill a tank in 10 minutes. A drain can empty the tank in 12 minutes. If the tank is empty and both the pipe and the drain are open, how long will it take before the tank overflows? Show all work. Explain how you solved the problem and why you did what you did to solve it.
Math time who can help me solve this (read I suck at math this is really easy for some. I have no idea how to start, I just need the algorithm not the answer, I'd like to do something for myself. )
An inlet pipe can fill a tank in 10 minutes. A drain can empty the tank in 12 minutes. If the tank is empty and both the pipe and the drain are open, how long will it take before the tank overflows? Show all work. Explain how you solved the problem and why you did what you did to solve it.
1/10 - 1/12=1/x multiply each term by 60x
6x-5x=60
x=60 min--------------time it takes for tank to overflow when both pipes are open and the tank is empty
CK
in 60 min inlet pipe fills (1/10)*60 or 6 tanks
in 60 min drain lets out (1/12)*60 or 5 tanks
So in 60 min we have a net gain of 1 tank---any more water and it overflows
1/10 - 1/12=1/x multiply each term by 60x
6x-5x=60
x=60 min--------------time it takes for tank to overflow when both pipes are open and the tank is empty
CK
in 60 min inlet pipe fills (1/10)*60 or 6 tanks
in 60 min drain lets out (1/12)*60 or 5 tanks
So in 60 min we have a net gain of 1 tank---any more water and it overflows
Comment