Given:
The radius of the inner circle = 12 yd
Width of the path = 6
One gallon of coating covered = 7
Find-: How many gallons of coating need.
Sol:
The radius of the path is:

So overall area is (area of a circle)

Radius of pool = 12
So the area of the pool is:

So the path area is:


If the one-gallon coating covered 7 then

So 81 gallons of coating need.