To find the area of the surface of the bass drum, we use the formula for the area of a circle:
A= pi x r^2
Given that the diameter of the bass drum is 28 inches, we first need to find the radius \( r \), which is half of the diameter:
r=28/2=14 inches
Now, we can use the formula to find the area:
a=pi x(14)^2
a= pi x 196
a= 615.75 square inches
So, the area of the surface of the bass drum is approximately 615.75 square inches.
