Question

what is the diameter of circle with area 7850 sq. cm? ​

Answer 1

Given:

• Area of Circle = 7850 cm²

To find:

• Diameter of circle?

Solution:

☯ Let radius of circle be r cm.

We know that,

★ Area of Circle = πr²

Now, Putting value,

⇒ 3.14 × r² = 7850

⇒ r² = 2500

⇒ r² = (50)²

⇒√r² = √2500²

⇒ r = 50 cm

Thus, Radius of circle is 50 cm.

We know that,

• Diameter of circle = 2 × Radius

∴ Diameter of circle 100cm.

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More to know:

• Circumference of Circle = 2πr

• Area of sector = θ/360 × πr²

• Length of an arc = θ/360 × 2πr

Answer 2

$\small \bf {Given}$

what is the diameter of circle with area 7850 sq. cm?

$\small \pmb {Solution}$

Let the radius of circle be r .

Formula :-

Area of circle = πr²

Now ,

3.14×r²

=7850

r² = 2500

r²=(50)²

√r²=√(50)²

√r²=√2500²

Now , r= 50 cm

Hence,Radius of circle is 50 cm.

We know that ,

Diameter of circle = 2×r (Radius)

Thus,the diameter of the circle is 100 cm.

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