At the park, there is a pool shaped like a circle with a diameter of 24yd. A ring-shaped path goes around the pool. Its width is 6yd.
We are going to give a new layer of coating to the path. If one gallon of coating can cover 7yd², how many gallons of coating do we need? Note that coating comes only by the gallon, so the number of gallons must be a whole number. (Use the value 3.14 for π.)
a) 18 gallons
b) 36 gallons
c) 54 gallons
d) 72 gallons