Rafael is building a circular table with a diameter of 2.5 feet. The wood costs $32.50 per square foot. How much will it cost Rafael to make the table? Use 3.14 to approximate π.

Answer 1

A = πr²

π = 3.14

r = d/2 = 2.5/2 = 1.25

A = 3.14 ⋅ 1.25² = 4.91 Ft²

4.91 × $32.50 = $159.45

It would cost $159.45 (mathematically)

BUT at the store wood is sold by the square foot so...

2.5 · 2.5 = 6.25 Ft²

6.25 · $32.50 = $203.13