# Two fish tanks, with 12 gallons & 3 gallons of water. The first fish tank is filled at rate of 1/3 gallons/minute and the other at a rate #1 ½# of the first. After how much time will both have equal amount of water if hoses are turned on simultaneously?

##### 2 Answers

The rate of filling the 1st tank

The rate of filling the 2nd tank

Let after t min the two tanks have equal amount of water,if hoses are turned on simultaneously. Initially two fish tanks, with 12 gallons & 3 gallons of water respectively.

So by the problem

**After** **minutes both tanks will have same amount of water.**

#### Explanation:

Let

Rate of filling water in first tank is

Rate of filling water in second tank is

By given condition ,

After