16. The line $P Q$ is divided into six parts by the points $V, W, X, Y$ and $Z$. Squares are drawn on $P V, V W, W X, X Y, Y Z$ and $Z Q$ as shown in the diagram. The length of line $P Q$ is $24 \mathrm{~cm}$. What is the length of the path from $P$ to $Q$ indicated by the arrows?

A $48 \mathrm{~cm}$
B $60 \mathrm{~cm}$
C $66 \mathrm{~cm}$
D $72 \mathrm{~cm}$
E $96 \mathrm{~cm}$
16. D The path indicated follows three sides of each of the squares shown. The sum of the lengths of one side of each square is equal to the length of $P Q$, which is $24 \mathrm{~cm}$. Therefore the length of the path is $3 \times 24 \mathrm{~cm}=72 \mathrm{~cm}$.