The circumference of a circle whose diameter is 7 inches is approximately ?

A. 22 inches
B. 28 inches
C. 38 inches
D. 154 inches

Given diameter of a circle is(d)=7cm.
Now, we know that circumference of circle is =πd, where d is diameter of circle.
So, here circumference is = π×7cm
=
7
22
×7cm
Circumference =22cm