Question

two pipe can fill a tank in 20 minute and 25 minute respectively . these are opened alternatively for one minute each, beginning with first . in how much time will the tank be full .​

Answer 1

Answer:

answer is 20 because it

thank you

Answer 2

Question:

____________

two pipe can fill a tank in 20 minute and 25 minute respectively . these are opened alternatively for one minute each, beginning with first . in how much time will the tank be full .

Answer:

__________

11 whole 1/9 minutes...

Explanation:

_______________

One pipe can fill a tank in 20 minutes. [ Pipe A]

Another pipe can fill a tank in 25 minutes. [ Pipe B]

In 1 minute, Pipe A can fill 1/20 th part of the tank.

In 1 minute, Pipe B can fill 1/25 th part of the tank.

Hence,

In 1 minute, Pipe A & B, together can fill -

[ 1/20 + 1/25 ] th part of the tank

[ 5 + 4 / 100 ] th part of the tank

9/ 100 th part of the tank

Therefore,

Pipe A & B , together can fill the tank in

100/ 9 minutes = 11 whole 1/9 minutes

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