Given
A picture 17 cm by 11 cm is framed on a piece of cardboard 20 cm by 15 cm.
To find the area of the cardboard to be seen.
Step-by-step explanation:
It is given that,
The length of the picture is 17cm, and its breadth is 11cm.
The length of the carboard is 20cm and its breadth is 15cm.
Then,
\begin{equation*} Area\text{ }of\text{ }the\text{ }cardboard\text{ }to\text{ }be\text{ }seen=Area\text{ of the cardboard}- \end{equation*}\begin{equation*} Area\text{ of the picture} \end{equation*}
Hence, the area of the cardboard to be seen is 113cm^2.