Answer : It will take 366 minutes to fill 1.00 gallon bucket.
Explanation :
We have been given the drip rate which is 41 drops/min
Let us use this as a conversion factor to ind out the minutes taken to fill 1 gal bucket. We will arrange this conversion factor in such way that , "drops" would get cancelled.
They have also given us that 1 gallon bucket contains 15000 drops.
The equation can be set up as follows.

It will take 366 minutes to fill 1.00 gal bucket.