Question

An observatory is shaped like a cylinder standing on one of its bases with a dome on top. The diameter of the floor of the observatory is 64 feet, as shown in the diagram. What is the measurement of the circumference of the base of the observatory in feet to the nearest hundredths place?

Answer 1

3215.36

Explanation:

C=πr²

C=3.14(32)²

C=3.14(32·32)

C=3.14(1024)

C=3215.36

Answer 2

201.14 ft

Explanation:

C = 2 π r = π d

C =
`(22)/(7)` × 64 ≈ 201.14 ft