Question

A circle of radius 2 cm is cut out from a square piece of an aluminium sheet 6 cm. What is the area of the left over aluminium sheet? (Take $\pi =3.14$)

Answer 1

Here radius of the circle $=2cm$

area of the circle $A_1=\pi r^2=3.14\times (2{)}^2$

$=3.14\times 4$

$=12.56c{m}^2$

side of the aluminium sheet, $a=6cm$

$\therefore$ area of the square shaped aluminium sheet,

$A_2=a^2=36c{m}^2$

Hence the area of the are aluminum sheet

$=A_2-A_1$

$=36-12.56$

$=23.44c{m}^2$