Question

What is the area of a circle with a radius of 5 inches?

Answer 1

78.5 square inches (Rounded to 3 significant figures)

Explanation:

r = radius of circle

= 5 inches

Area of circle =
`\pi r^(2)`

=
`\pi (5)^(2)`
`inches^(2)`

=
`25\pi`
`inches^(2)`

Entering the above in a calculator

=
`78.5398`
`inches^(2)`

=
`78.5` square inches (Rounded off to 3 significant figures)