Question

find the circumference and circle of diameter 3.5cm

Answer 1

r=3.5/2

C= 2πr
= 2× 22/7×3.5/2
= 11 cm

Hope it helps

Answer 2

circumference of circle is 2πr
in above question
2(22/7)(3•5/2)=2(22)(0•5/2)
(22)(0.5*2/2)=(22)(1/2)=22/2cm
circumference is 11cm