Question

plzz Give me the correct answer and steps also plzz Give me the answer fastt Plzz Help me​

Answer 1

(i) Diameter of semicircle= 14 m ( side of the cardboard )

radius of semicircle = 7 m

Area of cardboard= l*b

= 20*14

= 280 m

$area \: of \: semicircle \: = \pi {r}^{2} \div 2$

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

= 77m

Area of Design = Area of cardboard - 2(Area of semicircle)

= 280 - (77*2)

= 280 - 154

= 26 m^2 (answer)

(ii) Perimeter of cardboard = 68 m

Perimeter of semicircle = πr^2 + 2r

= 36 m

Perimeter of the design = Perimeter of cardboard - 2( Perimeter of the semicircle )