Question

if the circumference of a circular sheet is 154m ,find its radius .also find the area of the sheet.(take$\pi$=22/7)

Answer 1

Circumference = 2πr =154 m

=> 2 x (22/7) x r = 154
=> r = 24.5m

Area = πr^2 = (22/7) x r^2

=> (22/7) x (24.5)^2 = 1886.5 m2

Answer 2

the rule for circumference of a circle = 2$\pi$ radius
to find the radius= 154=2*22/7*r
                      154*7=2*22*r
                         1078  =44*r
                       r=1078/2
                       r=44/2
                         538/22
                   radius=24.5rule for are of a cirlce =$\pi$ r^2
                   =22/7*24.5*24.5
                   area= 1886.50m^2