Question

The area of a circle is 615.44 sq. inches. what is the diameter of the circle? use 3.14 for π.

Answer 1

155.9(1dp)
Let me know if its right.

Explanation:

Answer 2

Diameter = 28 inches

Explanation:

r = radius of the circle

d = diameter of a circle

=
`(d)/(2)`

A = Area of a circle

= 615.44 square inches

`A = \pi r^(2)`

`A = \pi ((d)/(2))^(2)`

`A = (\pi d^(2))/(4)`

Use π = 3.14 and Substitute the provided values in the above equation:

`615.44 = ((3.14)(d^(2)))/(4)`

Isolate d and make it the subject of the equation by applying Cross-multiplication:

`(615.44)(4) = 3.14d^(2)`

`d^(2) = ((615.44)(4))/(3.14)`

`d^(2) = 784`

Take square root on both sides to get rid of the square:

`\sqrt{d^(2)} = √(784)`

`d = √(784)`

∴d = Diameter of circle = 28 inches