Question

answer my question this question is from self study and answer of this question is 116 cm and 462 cm2 respectively

Answer 1

Hiiii. ....friend

The answer is here,


Given that,

OA=OB=OC=OD =14cm.

Length of the boundary = perimeter of two semi-circles +perimeter of OBC +perimeter of OAD.

$= > \: 2\pi \ r + 2( \frac{2\pi \ r}{4} )$

$= > \: 2( \frac{22}{7} )( \frac{14}{2} ) + \frac{22}{7} (14)$

$= > \: 44 + 44$

=> 88cms.

Area => Area of 2 semicircles +Area of two quadrant circle.

$= > \: 2( \frac{\pi {r}^{2} }{2} ) + \: 2( \frac{\pi {r}^{2} }{4} )$

$= > \: \pi {r}^{2} + \frac{\pi {r}^{2} }{2}$

$= > \: \frac{22}{7} ( {7}^{2} ) + \frac{1}{2} ( \frac{22}{7} )( {14}^{2} )$

$= > \: 154 + 308$

$= > \: 462 {cm}^{2}$

:-(Hope it helps u.