Three pipes, a, b, & c are attached to a tank. A & b can fill it in 20

1.	Three pipes, a, b, & c are attached to a tank. A & b can fill it in 20 & 30 minutes respectively while c can empty it in 15 minutes. If a, b & c are kept open successively for 1 minute each, how soon will the tank be filled?
Answer» ANSWER: it will take 180 minutes or 3hrs pipe a can fill the TANK in 20 minutes Pipe B can fill the tank in 30 minutes and pipe c can empty it in 15 minutes so EQUATION is 1/20+1/30-1/15= 1/60 1/60 of the tank will be filled in 3 minutes so tank will be filled completely in 180 minutes or 3 hours

Three pipes, a, b, & c are attached to a tank. A & b can fill it in 20 & 30 minutes respectively while c can empty it in 15 minutes. If a, b & c are kept open successively for 1 minute each, how soon will the tank be filled?

Answer»

ANSWER:

it will take 180 minutes or 3hrs

pipe a can fill the TANK in 20 minutes

Pipe B can fill the tank in 30 minutes

and pipe c can empty it in 15 minutes

so EQUATION is 1/20+1/30-1/15= 1/60

1/60 of the tank will be filled in 3 minutes

so tank will be filled completely in 180 minutes or 3 hours

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Three pipes, a, b, & c are attached to a tank. A & b can fill it in 20 & 30 minutes respectively while c can empty it in 15 minutes. If a, b & c are kept open successively for 1 minute each, how soon will the tank be filled?

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