SOLUTION: If one pump takes 12 minutes to fill a tank and another pump takes 20 minutes to fill the same size tank, how long would it take both pumps working together to fill one of the tank

Question 186341: If one pump takes 12 minutes to fill a tank and another pump takes 20 minutes to fill the same size tank, how long would it take both pumps working together to fill one of the tanks?
Answer by feliz1965(151) (Show Source): You can put this solution on YOUR website!
12 minutes is 1/5 of an hour.
20 minutes is 1/3 of an hour.
working together = 1/x
1/5 + 1/3 = 1/x
Our LCD = 15x
Multiply each term by the LCD to remove the fractions.
3x + 5x = 15
8x = 15
x = 15/8
x = 1_(7/8)

RELATED QUESTIONS
one pump can fill a tank in 12 minutes while another takes 16 minutes to empty the same... (answered by solver91311)

One pump fills a tank 4 times as fast as another pump. If the pumps work together, they... (answered by vleith)

A large pump can fill a tank in 28 minutes. Both a large pump and a small pump can fill a (answered by addingup,ikleyn)

one pump fills a tank 4 times as fast as another pump. If the pumps work together they... (answered by richwmiller)

One pump fills a tank 3 times as fast as another pump. If the pumps work together,... (answered by ramkikk66,josgarithmetic,greenestamps,ikleyn)

It takes Pump A 10 minutes longer to fill a tank with water than it takes pump B to fill... (answered by lwsshak3)

one pump fills a tank 5 times as fast as another pump. if the pump work together, they... (answered by josgarithmetic,MathTherapy)

One pump can fill a tank twice as fast as a second pump. If the pumps are used together,... (answered by stanbon)

One pump fills a tank two times as fast as another pump. If the pumps work together they... (answered by Edwin McCravy)