Question

the breadth of a rectangle is 4 cm les than its length. il the length is increased by 4 cm and the breadth is decreased by 1 cm , the area of the rectangle is increased by 40cm square . find the length and breadth of the rectangle.​

Answer 1

Answer:

Length-20cm

Breadth-16cm

Step-by-step explanation:

If breadth=x

length =x+4

Area=x(x+4)=x2+4x

New area

Length =x+8

Breadth =x-1

Area=(x+8)(x-1)=x2+7x-8,which is original area+40

X2+7x-8=x2+4x+40

x2-x2+7x-4x=40+8

3x=48

x=16

Length =x+4=20

Breadth =x=16

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