Given:
Inner radius circle = 10yd
Outer radius circle = 14 yd
One gallon of coating can cover = 4
Find-: How many gallons of coating do we need?
Sol:
The area of a circle is:
The area of the outer circle is:
The area of the inner circle:
So the pool area is:
If one gallon of coating covers 4.
So 75 gallons use for coating.