Question

What is the area of a circle that has a circumference of 42 inches?

A. 126.60 in2
B. 132.62 in2
C. 140.4 in2
D. 21.04 in2

Answer 1

Circumference = 2πr = 42 in.
2πr = 42 in.
πr = 21
r =
`21 * (7)/(22) = (147)/(22) = 6.68 \:in.`

Area = πr²
π*6.68²
π*44.62
= 140.24 inches²

Answer will be C. 140.4 in.² as it is very close to our answer.

Answer 2

c is the answer because 42in circle is 140.37 rounded to the nearest tenth

is 140.4