Question

Find the perimeter of rectangel Whose area length is 20cm and breadth 46cm​

Answer 1

Area = L x B = 20 x 46 = 920 cm²

Perimeter = 2(L + B ) = 2(20 + 46)

= 2 (66) = 132 cm. answer

Answer 2

$\huge\sf\color{pink}\underline{Question}$

Find the perimeter of rectangel Whose area length is 20cm and breadth 46cm.

$\huge\sf\color{blue}\underline{Answer}$

$=98cm$

$\huge\sf\color{red}\underline{Solution}$

In ∆ ACD,

AB = CD

AD = 41 cm

⦟ACD = 90° ( Rectangle had 90° on all both sides )

$By\; Pythagoras\;Theorem$

AD² = AC² + CD²

AD² - CD² = AC²

(41)² - (40)² = AC²

1681 - 1600 = AC²

=> AC = √81

=> AC = 9cm

$Perimeter\;of\; rectangle= 2(l+b)$

=> 2(40+9)

=> 2× 49

=> 98cm

$Answer=98cm$