Question

A pipe can fill a cistern in 4 hours due to leak in its bottom the cistern fills up in 5 hours. if the cistern is completely filled, in how mach time will it be emptied by leak
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Answer 1

Answer:

See it takes 4hrs to fill the cistern so in 1hr 1/4th of the cistern gets filled.Next we see that due to leak the cistern gets filled in 5hrs i.e in 1 hr 1/5 th of the cistern is filled.

So in how many hrs will it get empty when it is filled?

That is 1/4(amt filled without leak)-1/5(amt filled with leak)

So 1/4-1/7=1/5=20hrs

Hope it helps☺

Answer 2

Answer:

20 hours

Step-by-step explanation:

it takes 4 hour to filled a cistern but due to leakage in the bottom of cistern they take 5 hours to filled a cistern then the cistern is completely filled, How many time take?

4*5=20