Question

1) Find the area of the shaded portion in the following figure.⬆️

Book Back answer is:-
176 cm².

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Answer 1

Answer:

answer for the given problem is given to

Answer 2

outer circle

given:

1. radius= 9cm

to find:

area

formula:

$area \: \: circle \: = \pi {r}^{2} \\ \\ = \frac{22}{7} \times {9}^{2} \\ \\ = \frac{22}{7} \times 81 \\ \\ = \frac{22 \times 81}{7} \\ \\ = \frac{1782}{7} \\ \\ = 254$

inner circle

given:

radius=5

$area \: \: of \: circle \: = \pi {r}^{ 2} \\ \\ = \frac{22}{7} {5}^{2 } \\ \\ = \frac{22}{7} \times 25\\ \\ = \frac{550}{7} \\ \\ = 78$

area of outer circle - area of inner circle=area of shaded part

=254 - 78

=176cm

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