Question

A CD has a diameter of 12 cm. The hole in the middle of the CD has a diameter of 1.5 cm. Find the area of the CD to the nearest tenth. Use 3.14 for ​π.

A. 111.3 cm2
b. 113.0 cm2
c. 349.4 cm2
d. 445.1 cm2

Answer 1

C. because to work out the area it is pi radius squared. the area of the CD as a whole is 354.94. The smaller circle inside is 5.55. so 354.94 take away 5.55 is 349.39 rounded up so 349.4 cm^2