<PRE><B>Question 1157097</B>
Working together, it takes two different sized hoses 25 minutes to fill a small swimming pool.

Together they fill in 25 minutes
They fill 1/25 of the pool in 1 min

larger hose  takes 35 minutes  to fill the pool by itself,
It fills 1/35 of the pool in 1 minute


let smaller hose  x minutes alone to fill the pool

it fills 1/x of the pool in 1 minute
 =
1/x +1/35 =1/25

1/x = 1/25 -1/35

1/x = 10/875

x= 87.5 minutes

 how long will it take the smaller hose  on its own?</PRE>