Question

What is the approximate area of a circle with a radius of 15 ft?

Use your calculator button forππ.

Round to one decimal

Question 1 options:

706.9


706.8


47.1


94.2

Answer 1

The formula for the area of a circle is:
π r²

So we would do;
π x 15² = 706.8583
= 706.9 (to 1 decimal place)

Answer 2

The area of any circle can be found by the formula
`A=\pi r^(2)`

That is :Square the radius and multiply by pi to find the area of the circle.

Here r denotes the radius of the circle .
`\pi` has a fixed value.

In the question radius is given as 15 ft.Substituting r with 15 ft in the area of circle we have:

A=
`\pi 15^(2)`

A=
`\pi .225`

A= 706.85.

A=706.9( Rounded to one decimal place)

Approximate area of circle with radius 15 ft is 706.9 square ft,

First option is the right answer.