Question

the length of a rectangle exceeds it's breadth by 4 cm. if length and breadth are each increased by 3 cm, the area will be 81 sq cm than that of the given rectangle. find the length and breadth of the given rectangle​

Answer 1

Answer:

let the breadth be x

then length = x+4

new length =x+7

new breadth =x+3

area = (x+7)(x+3)

$81 = (x + 7)(x + 3) \\ 81 = x(x + 3) + 7(x + 3) \\ 81 = {x}^{2} + 3x + 7x + 21 \\ 81 = {x}^{2} + 10x + 21$

Step-by-step explanation:

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