Question

. Find the circumference of a circle whose radius 10.5 cm​

Answer 1

Answer:

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Step-by-step explanation:

Given radius = 10.5 cm

We know that, circumference of the circle is 2πr

= (2 × 22/7 × 10.5)

= (21 × 22/7)

= 66 cm

Answer 2

Required Answer:-

Question:

• Find the circumference of a circle whose radius is 10.5cm

Solution:

We know that,

$\dag \boxed{\tt C = 2\pi r}$

Where,

• C = Circumference of the circle.
• r = Radius of circle.

To calculate the radius of circle, we will simply plug in the value of r in this formula.

$\tt \implies C = 2 \times \dfrac{22}{7} \times 10.5 \: cm$

$\tt \implies C = 2 \times \dfrac{22}{7} \times \dfrac{105}{10} \: cm$

$\tt \implies C = 2 \times \dfrac{22}{7} \times \dfrac{21}{2} \: cm$

$\tt \implies C = \dfrac{22}{7} \times 21\: cm$

$\tt \implies C = 22 \times 3\: cm$

$\tt \implies C = 66\: cm$

★ Therefore, the circumference of the circle with radius 10.5 cm is 66cm.

Answer:

• C = 66 cm.