Question

Find the circumference of a circle whose diameter is 8.6 cm(Take π as 22/7)

Answer 1

diameter=8.6

radius=8.6/2

circumference of circle=2πr

= 2×22/7×8.6/2

=1892/7

=27.02857........ans.

hope it will helps!!

Answer 2

The circumference of a circle whose diameter is 8.6 cm is 27.03 cm

Given :

The diameter of a circle is 8.6 cm

To find :

The circumference of the circle

Formula :

For a circle of radius r unit the circumference of the circle = 2πr unit

Solution :

Step 1 of 2 :

Find radius of the circle

Here it is given that the diameter of a circle is 8.6 cm

The radius of the circle

= r

= 8.6/2 cm

= 4.3 cm

Step 2 of 2 :

Find circumference of the circle

The circumference of the circle

= 2πr cm

$\displaystyle \sf{ = 2 \times \frac{22}{7} \times 4.3 \: \: cm }$

$\displaystyle \sf{ = 27.02857 \: \: cm }$

$\displaystyle \sf{ \approx \: 27.03 \: \: cm }$

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