Question

one tap fills a tank in 20 minutes and another tap fills it in 12 minutes .the tank being empty and if both taps are opened together in how many minutes tank will be full.​

Answer 1

Answer:

assuming that the tank was empty at first, the tank would fill 1/20 of the tank in a minute.

Now assume that the tank was full with water. The other tap can now empty 1/30 of the tank in a minute.

Subtracting the rate of the second tap to the rate of the first tap, I would get the amount of water filled in a minute with both taps opened, which is 1/20–1/30=1/60

To fill the tank, 1/(1/60) would give us 60, which means that the tank takes 60 minutes (1 hour) for it to be full with both taps on.

Step-by-step explanation:

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