Question

7. POOL The area of a circular pool cover is

314 square feet. Write and solve an equation
to find the diameter of the pool cover.
Use 3.14 for T. (Section 7.1)

Answer 1

d = 20 ft

Explanation:

the area (A) of a circle is calculated as

A = πr² ( r is the radius )

given A = 314 , then

πr² = 314 , that is

3.14r² = 314 ( divide both sides by 3.14 )

r² =
`(314)/(3.14)` = 100 ( take square root of both sides )

r =
`√(100)` = 10

then

diameter d = 2r = 2 × 10 = 20 feet