Question

the area of a circular plate is 154 cm. find the circumference of the circle (use = 22/7 ).​

Answer 1

Step-by-step explanation:

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Answer 2

Before, finding the answer. Let's find out, on how we can find the answer.

• First, we must find the radius of the circle by using the formula of

$\boxed{\pi r^2}$

• Next, we must find the circumstance by the formula of

$\boxed{2\pi r}$

______________________

Given :

• Area = 154 cm

To find :

• Cirumference

Solution :

We know that,

Area of the circle is πr²

But, the area given is 154cm²

So we can say that,

→ πr² = 154

Where,

r is the radius

Taking π as 22/7

$\sf \: = \dfrac{22}{7} × {r}^{2} = 154$

$\sf→ r^2 = 154 × \dfrac{7}{22}$

→ r² = 7 × 7

→ r = √7 × 7

→ r = 7 cm

Hence, Radius is 7 cm.

Circumstance of the circle = πr²

Where, r is radius = 7cm.

Taking π as 22/7

So, the circumstance of the circle is -

→ 2πr

→ 2 × 22/7 × 7

→ 44cm²

Hence, the circumstance of Circle is 44 cm².