Question

The inner and and Outer diameter of ring are 20 cm and 36 CM respectively find the area of the Ring

Answer 1

Answer:

Step-by-step explanation:

Here is your answer

Refer this attachement

Answer 2

The area of the ring is equal to 704 $cm^{2}$.

Step-by-step explanation:

Given,

The inner diameter of ring = 20 cm

∴ The inner radius of ring (r) = 10 cm

The outer diameter of ring = 36 cm

∴ The outer radius of ring (R) = 18 cm

To find, the area of the ring = ?

We know that,

The area of the ring = $\pi(R^2-r^2)$

= $\pi(R+r)(R-r)$

= $\dfrac{22}{7} (18+10)(18-10)cm^{2}$

= $\dfrac{22}{7}(28)(8)cm^{2}$

= 88 × 8 $cm^{2}$

= 704 $cm^{2}$

∴ The area of the ring = 704 $cm^{2}$

Thus, the area of the ring is equal to 704 $cm^{2}$.