Question

find the circumference of a circle whose diameter is 10.5

Answer 1

Given diameter = 10.5 cm
Circumference of cirecle = π2r = πd (since 2r = d)
                                           = 22/7*10.5
                                           = 33 cm

Answer 2

hey friend!!!

here's the answer...............

diameter=10.5
radius=5.25

Circumference of circle=2πr
=2×22/7×5.25
=66

therefore, circumference of circle=66

hope it helps!!!!!