Question

7.
(c) radius = 5 cm
3. If the circumference of a circular sheet is 154 m, find its radius. Also find the area of
the sheet. (Take it =22
7
​

Answer 1

circumference of circular=πr^2

πr^2=154m

22/7×r×2=154m

r=154×7/2×22

r=77×7/22

r=7×7/2

r=49/2

r=24.5m

now,

area=πr^2

=22/7×245/10×245/10

=11×49×49/14

=26411/14

=1886.5m^2 Ans.