Question

The area of the shaded portion in the given figure is :​

Answer 1

Step-by-step explanation:

$\pi \: r1 {}^{2} - \pi \: r2 {}^{2} = \pi(5 {}^{2} - 4 {}^{2} ) = \pi(25 - 16) = \pi \times 9 = 22 \div 7 \times 9 = 28.28$

Swipe --------›

Answer 2

Answer:

area of big semi circle = πr²/2

= 22/7 * 5*5*1/2

=55*5/7

= 275/7 cm²

area of small semi circle = πr²/2

= 22/7 * 4 *4 *1/2

=176/7 cm²

now area of shaded region = area of big semi circle - area of small semi circle

=( 275/7 - 176/7) cm²

= 14.142 cm²