Question

lenght and breadth of a rectangle box is in ratio 4:5 if it's perimeter 4 m 40 cm find its dimension​

Answer 1

$l = 4x \\ b = 5x$

$perimeter = 4m40cm \\ = 440cm$

$perimeter \: of \: rectangle = 2(l +b )$

$440 = 2(4x + 5x)$

$440 = 2(9x)$

$\frac{440}{2} = 9x$

$220 = 9x$

$\frac{220}{9} = x$

$24.4 = x$

$l = 4x \\ = 4 \times 24.4 \\ = 97.6$

$b = 5x \\ = 5 \times 24.4 \\ = 122$

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Answer 2

Answer:

length = 97.77 cm approx

breadth= 122.22 cm approx

Step-by-step explanation:

A/Q, let length be l cm and breadth be b cm

then, l/b= 4/5

l= (4/5)*b

l= 0.8b

perimeter= 2*(l+b)

440= 2( 0.8b+b)

220/1.8= b

b= 122.22 cm

therefore l= 0.8* 122.22

= 97.77 cm