There are (110+115) * 2+x/15 =1.

X= 10 days

Suppose it takes time Xh.

Then1/4+(1/4+1/6) x =1.

X=9/5h

3. Let it fill in x hours.

Then it is (1/6+110) * (5/2)+(1/6+1/9) x = 65438.

X= 15/7 hours