The lens on a telescope has a diameter of 200 in. Find the area of the lens of the telescope. Give the exact value. A) 200 $\pi$in ² B) 10,000 $\pi$in ² C) 80,000 $\pi$in ² D) 160,000 $\pi$in ² E) 400 $\pi$in ²

Question

Quizplus · Accepted Answer

The area of a circle is given by the formula $A = \pi r^2$. Given the diameter is 200 inches, the radius is half of that, which is 100 inches. Plugging into the formula gives $A = \pi (100)^2 = 10,000\pi$ square inches.

The Lens on a Telescope Has a Diameter of 200 π\piπ

The Lens on a Telescope Has a Diameter of 200 $\pi$