question_answer 4)

A rectangular sheet of paper is \[12\frac{1}{2}\text{cm}\] long and \[10\frac{2}{3}\text{cm}\]wide. Find  its perimeter

Answer:

                Perimeter of the rectangular sheet of paper                 \[=2\times [\text{Length + Breadth}]\]                 \[=2\times \left[ 12\frac{1}{2}+10\frac{2}{3} \right]=2\times \left[ \frac{25}{2}+\frac{32}{3} \right]\]                 \[=2\times \left[ \frac{75+64}{6} \right]=2\times \left( \frac{139}{6} \right)=\frac{139}{3}=46\frac{1}{3}\text{cm}\text{.}\] \[\left| \begin{align}   & \text{ 3}\overset{46}{\overline{\left){\text{ 139}}\right.}} \\  & \,\,\,\,\frac{-12}{\begin{align}   & \,\,\,\,19 \\  & \frac{-18}{\underline{1\,\,\,\,\,\,}} \\ \end{align}} \\ \end{align} \right.\]