Question

A cone-shaped paperweight is 5 inches tall, and the base has a circumference of about 12.56 inches. What is the area of the vertical cross section through the center of the base of the paperweight?

Answer 1

12.57 square inches

Explanation:

Given: Height of paperweight (h) = 5 inches, Circumference of base (C) = 12.56 inches.

The formula for circumference of a circle is: C = 2πr, where r is the radius.

Equate the circumference to 12.56 inches: 12.56 = 2πr.

Solve for the radius (r): r = 12.56 / (2π).

Calculate the radius: r ≈ 2 inches.

The formula for the area of a circle is: A = πr^2.

Substitute the radius (r ≈ 2 inches) into the formula: A = π(2^2) = π(4).

Calculate the area: A ≈ 12.57 square inches.