Question

18. (1) Circumference of circle ( =4 times 11=44 mathrm{cm} )
( therefore )
( 2 pi r=44 mathrm{cm} )
( Rightarrow quad r=frac{44}{2 pi}=7 mathrm{cm} )
( therefore ) Area of circle ( =pi r^{2}=frac{22}{7} times 7 times 7=154 mathrm{cm}^{2} )

# 18. The area of the circle whose circumference is equal to the perimeter of a square of side 11 cm is (1) 154 cm2 (3) 134 cm (2) 144 cm (4) 124 cm2

Solution