Answer:
The answer is 3 gallons of paint.
Step-by-step explanation:
Elena is painting a fence she has already determined that she needs 1 gallon of paint total for each 10 feet of fencing.
The dimensions of yard are = 3 yards by 2 yards.
We will convert the yards in feet.
1 yard = 3 feet
So, the dimensions are = 9 feet by 6 feet
Perimeter will be = 
=
feet
Now its given that, 1 gallon paints 10 feet of fencing.
So, to paint 30 feet of fence, the paint required will be =
gallons.
Therefore, the answer is 3 gallons of paint.