Question

Radii of two concentric circle is 7 cm and 14 cm. The shaded area between them is equal

to

(A) 42 (B) 84 (C) 21 (D) None of these

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Answer 1

(D) none of these l hope this is the correct answer please mark me as brainliest and please follow me

Answer 2

Answer:

$Let \: outer \: circle \: Radius, \: R = 14 cm \\ </p><p>inner \: circle \: radius, \: r = 7 cm \\ </p><p>Required Area = \pi \: ( {R}^{2} - {r}^{2} ) = \frac{22}{7} ( {14}^{2} - {7}^{2} ) \\ = \frac{22}{7} (14 + 7)(14 - 7) \\ = \frac{22}{7} \times 21 \times 7 \\ = 462 {cm}^{2}$

Answer D none of these