Question

find the area of the shaded region in the adjoining figure .given that diameter of the biggest circle is 28cm.

Answer 1

final answer is 308cm^2

Answer 2

Answer:

$\text{Area of shaded region is }308 cm^2$

Step-by-step explanation:

we have to find the area of the shaded region in the adjoining figure

Diameter of biggest circle=28 cm

⇒ Radius=14 cm

Radius of biggest circle is the diameter of smaller circle

Radius of smaller circle=7 cm

$\text{Area of biggest circle }=\pi r^2$

                                       $=\pi (14)^2=196\pi cm^2$

$\text{Area of 2 smaller circle }=2(\pi r^2)$

                                       $=2(\pi (7)^2=98\pi cm^2$

$\text{Area of shaded region }=196\pi -98\pi =98\pi =98\times \frac{22}{7}=308 cm^2$