Two pipes P and Q can fill an Empty tank in 16 minutes and 20 minutes

1.	Two pipes P and Q can fill an Empty tank in 16 minutes and 20 minutes respectively. pipe R alone can empty the completely fill the tank in 4 minutes. firstly both pipes p and q are opened and after 5 minutes pipe R is also opened. how long will it take to empty the tank completely?
Answer» Answer: AMOUNT filled by A in 1 min = 24 1 Amount filled by B in 1 min = 32 1 Lets assume that pipe A is TURNED off after X min Given total time taken is 28 min Now, 24 1 x + 32 (28−x) = 1 By solving we get x=12 Hence pipe A has to be turned off after 12min

Two pipes P and Q can fill an Empty tank in 16 minutes and 20 minutes respectively. pipe R alone can empty the completely fill the tank in 4 minutes. firstly both pipes p and q are opened and after 5 minutes pipe R is also opened. how long will it take to empty the tank completely?

Answer»

Answer:

AMOUNT filled by A in 1 min =

Amount filled by B in 1 min =

Lets assume that pipe A is TURNED off after X min

Given total time taken is 28 min

Now,

x +

(28−x)

= 1

By solving we get x=12

Hence pipe A has to be turned off after 12min

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Two pipes P and Q can fill an Empty tank in 16 minutes and 20 minutes respectively. pipe R alone can empty the completely fill the tank in 4 minutes. firstly both pipes p and q are opened and after 5 minutes pipe R is also opened. how long will it take to empty the tank completely?​

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Two pipes P and Q can fill an Empty tank in 16 minutes and 20 minutes respectively. pipe R alone can empty the completely fill the tank in 4 minutes. firstly both pipes p and q are opened and after 5 minutes pipe R is also opened. how long will it take to empty the tank completely?