Question

A cistern has two pipes one of which pours in 4/15 litres of water and the other empties 2/3 litres every minute. The cistern has 36 litres of water; when will it be emptied if both the pipes be opened at a time??​

Answer 1

Step-by-step explanation:

Try to use mthod of proportions

let it be this way :

3/4 - 15 min = 1/2 - x mins , so following the rules of proportions we got

1/2 *15 and divide it to 3/4

After all we got - x= 10 mins

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Answer 2

Answer:

after a specific time hahah just kidding here's your answer below xD

Step-by-step explanation:

here's a example below you can solve it this way

3/4 of the cistern is filled in = 15- minutes.

½- of the cistern will be filled in =15x(1/2)/(3/4) = 15 x (1/2) x 4/3)

=10-minutes

I have posted the example knowingly as it will help you more effectively if you solve it by your own by my examples reference