Question

Find the circumference of a circle whose
diameter is 6.6 cm.​

Answer 1

Answer:

20.73cm

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Answer 2

Step-by-step explanation:

Given:-

A circle whose diameter is 6.6 cm.

To find:-

Find the circumference of a circle whose

diameter is 6.6 cm.

Solution:-

Method-1:-

Diameter of a circle (d)=6.6 cm

Radius of the circle (r) = Diameter/2

=>r = 6.6/2

=>r = 3.3 cm

Radius of the circle = 3.3 cm

We know that

Circumference of a circle whose radius is 'r' units

=>C = 2πr units

=>C = 2×(22/7)×3.3 cm

=>C = (2×22×3.3)/7 cm

=>C = 145.2/7 cm

=>C = 20.74 cm ( approximately)

Method-2:-

Diameter of a circle (d)=6.6 cm

We know that

The Circumference of a circle whose diameter is 'd' units = C = πd units

=>C = (22/7)×6.6 cm

=>C = (22×6.6)/7 cm

=>C = 145.2/7 cm

=>C = 20.74 cm (approximately)

Answer:-.

The Circumference of the given Circle is 20.74 cm

Used formulae:-

• Circumference of a circle whose radius is 'r' units C = 2πr units

• The Circumference of a circle whose diameter is 'd' units = C = πd units

• π=22/7