Question

find the shaded region where radius =7



​

Answer 1

Answer:

115.5 cm²

Step-by-step explanation:

$A=\pi r^{2}$

$A_{outer}$ = $\frac{22}{7}$ ( 7² ) = 154 cm²

$A_{inner}$ = $\frac{22}{7}$ (3.5)² = 38.5 cm²

$A_{outer}$ - $A_{inner}$ = 154 - 38.5 = 115.5 cm²