Question

Can you help me find the area of that paper that remains?

Answer 1

The diagram is given.

To determine the area of the paper that remains.

First calculate the area of rectangle , using the formula.

`A=l* w`

The diameter of semicircle is given 12 cm.

To calculate the area of semicircle , use the formula.

`A=(\pi)/(2)(r^2)`
`A=(3.14)/(2)*((12)/(2))^2=56.52sq.cm`

Then the area of paper that remains will be the area of rectangle subtracted from area of two semicircle .

`A=324-(2*56.52)=324-113.04=210.96sq.cm`

Hence the area of paper that remains is 210.96 sq.cm.