Question

find is cercumfrence whose diameter is 10.5 in

Answer 1

the volume of circumference is 2×pie×r
putting the values in the Formula.

Answer 2

diameter = 10.5
radius= 10.5/2
=5.25
circumference=
$2 \times \pi \times r$
= 2× 22/7 × 5.25
= 32.97