Question

Find the circumference of a circle whose area is 4 times the area of a circle with diameter 28cm.

Answer 1

It is yours question solution

Answer 2

The circumference of circle whose area is 4 times the area of a circle with diameter 28 cm is 176 cm

Step-by-step explanation:

Diameter of circle = 28 cm

Radius of circle =$\frac{28}{2} = 14 cm$

Area of circle = $\pi r^2 = \frac{22}{7} \times 14^2 =616$

We are supposed to find the circumference of a circle whose area is 4 times the area of a circle with diameter 28cm.

$\pi r^2 = 4(616)\\r=\sqrt{4(616) \times \frac{7}{22}}$

r=28

Circumference $= 2 \pi r = 2 \times \frac{22}{7} \times 28 =176 cm$

Hence The circumference of circle whose area is 4 times the area of a circle with diameter 28 cm is 176 cm

#Learn more:

Find the circumference of a circle whose radius is 28cm take π as 22/7

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