Question

The raddi of two concentric circles are 123 cm and 73cm,respectively.By how much does the area of outer circle exceed the area of inner circle?

Answer 1

Answer:

$30800cm^{2}$

Step-by-step explanation:

1. R of big circle = 123 cm

   r of small circle = 73 cm

2.  Area by which larger circle exceeds Area of smaller circle =  $\pi R^{2} - \pi r^{2}$

3. substitute R and r

4. we get 22/7  (15129 - 5329)

5. 22/7 (9800)

6. 22* 1400

7. 30800$cm^{2}$