To find out how much the contractor will spend on tiles, you will need to find the area of the circular space.
Use the formula for finding area of a circle.
A = pi x r^2
3.14 x 60^2
A= 11,304 in.².
Multiply this by $0.04 per square inch.
11304 x 0.04 = $452.16
The cost is $452.16.