Question

The circumference of a circle is 22cm.find its radius and diameter.

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Answer 1

Answer:

Answer. Radius is 3.5 cm and diameter is 7cm.

Answer 2

Given:

✰ The circumference of a circle = 22 cm

To find:

✠ Radius of a circle.

✠ Diameter of a circle.

Solution:

We will find the radius of the circle by using the formula to calculate the circumference of the circle, putting the values in the formula and forming the required equation, then we know that the diameter is two times the radius of a circle, so we will multiply 2 with the radius of the circle to get diameter.

✵ Circumference of circle = 2πr

Putting the values in the formula, we get

• 22 = 2πr

• 22 = 2 × 22/7 × r

• 22 = 44/7 × r

• r = (22×7)/44

• r = 154/44

• r = 3.5 cm

∴ The radius of a circle = 3.5 cm

Now, let's find out diameter

Diameter of a circle = 2 × Radius

• Diameter of a circle = 2R

• Diameter of a circle = 2 × 3.5

• Diameter of a circle = 7 cm

∴ The diameter of a circle = 7 cm

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