Question

the circumference of circle is equal to the perimeter of a square of side 22cm. the area of the circle is

Answer 1

perimeter of square = circumference of circle
4a=2×22/7×r
4×22=44/7r
88=44/7r
r=88×7/44
r=14

area of circle =22/7r^2
=22/7×14×14
area of circle =22×2×14
area of circle = 626 cm ^2

Answer 2

perimeter of square =4×side
=4×22=88
circumference of circle=88
2pir=88
r=88/2pi
=88×7/2×22

=14
area of circle=pi r^2
=22/7×14×14=616cm^2