Question

A 25-inch wide drum is used in a marching band.

What area does the top of the drum cover? Round to the nearest hundredth. (Use 3.14 for pi.)

Answer 1

Hello from MrBillDoesMath!

Answer:

490.87 square inches

Discussion:

We are given that

d = 25 => As d(iameter) = 2 * r

2r = 25 => divide both sides by 2

r = 25/2 = 12.5

The area of a circle of radius "r" is Pi * r^2. Plugging in our specific numbers gives

A = Pi * (12.5)^2

= (3.1415) * (156.25) approximately

= 490.87

Thank you,

MrB