Question 32
To make 9 circular cardboard discs for Carnival, use square sheets of $10~\mathrm{cm}$ on each side as shown in the figure. What is the area of unused paper?
(A) $25~\mathrm{cm}^2$
(B) $22,5~\mathrm{cm}^2$
(C) $21,5~\mathrm{cm}^2$
(D) $21~\mathrm{cm}^2$
(E) $22~\mathrm{cm}^2$
(A) $25~\mathrm{cm}^2$
(B) $22,5~\mathrm{cm}^2$
(C) $21,5~\mathrm{cm}^2$
(D) $21~\mathrm{cm}^2$
(E) $22~\mathrm{cm}^2$