Solve the Problem, If Possible $16 \mathrm{~cm}$ By $20 \mathrm{~cm}$ the Printed Matter on a Page of the Book

Multiple Choice

Solve the problem, if possible. Round your answer to the nearest tenth, when appropriate.
-A book has pages that are $16 \mathrm{~cm}$ by $20 \mathrm{~cm}$ . The printed matter on a page of the book must cover $140 \mathrm{~cm}^{2}$ . If all margins are to be the same width, how wide should the margins be?

A) $9 \mathrm{~cm}$
B) $12 \mathrm{~cm}$
C) $3 \mathrm{~cm}$
D) $2 \mathrm{~cm}$