Knowledgestorm
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Points!!!
The pump used to fill the water tank on a fire truck takes 40 minutes to fill the tank. If the pump sending water to the hose is on, it takes 60 minutes to fill the tank. If the pump filling the water tank is off, how long does the pump sending water to the hose take to empty the tank?
A.) 120
B.) 60
C.) 30
D.) 24

Respuesta :

bookishfairy73
(1/40) - (1/x) = (1/60) 
x = 1/(1/40) - (1/60)) =
A.) 120 minutes 
Its similar to the other question.
4.30 mWhat
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