Question

Find the circumference of a circle whose diameter is 3.5

Answer 1

Step-by-step explanation:

Diameter = 3.5

radius = 3.5/2

Circumference = 2πr

=$2 \times \frac{22}{7} \times \frac{3.5}{2}$

= 2×11×0.5 cm²

= 22×0.5 cm²

= 11 cm²

___________

in value of π = 3.14

Then,

=2× 3.14 × 3.5/2

= 10.99

Answer 2

Step-by-step explanation:

d = 2πr

r= d÷2

r= 3.5÷2

r= 1.75

circumference of circle= 2πr

2×22÷7×3.5÷2

=22×0.5

=11 cm