Question

ratio of length and breadth of a rectangle is 4:3and perimeter 84cm.what is the area of rectangle​

Answer 1

Answer:

let the width of rectangle be x unit

then putting in proportion,

84:x :: 4:3

or, 84 * 3 = x * 4

(84* 3) / 4 = x

21 * 3 = x

63 = x

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Length : breadth = 4 : 3

perimeter of the rectangle = 84cm.

let, length of the rectangle ( l ) = 4x

breadth of the rectangle ( b ) = 3x

perimeter = 2 ( l + b )

84 = 2 ( 4x + 3x )

》 4x + 3x = 84/2

》 7x = 42

》 x = 42/7

》 x = 6.

Length of the rectangle = 4x = 4 ( 6 ) = 24 cm.

Breadth of the rectangle = 3x = 3 ( 6 ) = 18 cm.

area = length ×breadth

= 24 × 18

= 432 cm