Question

Select the correct answer.

A telescope has a lens with a 40-meter circumference. The engineers erect scaffolding around the telescope to support the lens. If the
scaffolding will be in the shape of a square, at least how long is each side of the scaffolding?
A. 20 m
B. 40 m
C. 30 m
D. 10 m

Answer 1

The correct answer is:

C. 30 m

Explanation:

Since the lens has a 40-meter circumference, it means that the perimeter of the square scaffolding needs to be at least 40 meters in order to surround the lens. A square has all four sides of equal length, so if the perimeter is 40 meters, each side of the square (scaffolding) should be 40 / 4 = 10 meters. Therefore, none of the provided options match the correct answer.