Question

two taps can fill a cistern in 10hours and 8 hours. a third tap can empty it in 15 hours. how long will it take to fill the cistern if all the taps are opened at the same time.....20 points question​

Answer 1

Answer:

Step-by-step explanation:

two taps can fill a cristem in 10hours and

8 hours. a third tap can empty it in 15

hours. how long will it take to fill the

cistem if all the taps are opened at the

same time.....20 point question

Answer 2

Answer:

total time taken to fill cistern is 120/19.

Step-by-step explanation:

Time taken by first cistern to fill in an hour is 1/10 of part

Time taken by second cistern in an hour to fill is 1/8 of part

Time taken by third cistern in an hour to emptyis 1/15 of part

Then

=1/10+1/8-1/15

=12+15-8/120=19/120

Then total time taken is 120/19