Question

(3) What is the circumference of a circle of diameter 10 cm ? ( take u = 3.14).

Answer 1

Given:

A circle with -

• Diameter = 10 cm

What To Find:

We have to -

• Find the circumference of the circle.

Formula Needed:

The formula is -

• $\bf C = 2 \pi r$

Abbreviations Used:

• C = circumference
• $\pi$ = pie (3.14)
• r = radius

Solution:

• Finding the radius.

We know that,

$\sf \implies r = \dfrac{d}{2}$

Where,

$\sf \implies d = diameter$

Substitute the values,

$\sf \implies r = \dfrac{10}{2}$

Divide 10 by 2,

$\sf \implies r = 5 \: cm$

• Finding the circumference.

Using the formula,

$\sf \implies C = 2 \pi r$

Substitute the values,

$\sf \implies C = 2 \times 3.14 \times 5$

Multiply the numbers,

$\sf \implies C = 31.4 \: cm$

Final Answer:

∴ Thus, the circumference of the circle is 31.4 cm.

Answer 2

Answer:

Answer is given in the picture