Question

differentiate between circumference and radius of circle is 37cm find area of circle

Answer 1

C - r = 37
=> 2*pi*r - r = 37
=> r(2pi - 1) = 37
=> r (44/7 - 1)=37
=> r*37/7 = 37
=> r = 37*7/37
=> r = 7cm

Area = pi r^2
= 22*7*7/7
= 22*7
= 154 cm^2