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Algebra

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Length of rectanngle is 1 cm more than width. If length of rectangle is doubled the area is increased by 30cm2. find dimensions of original rectangle.

  • Algebra -

    if the length and width are x,y respectively, then

    x = y+1
    2xy = xy+30

    xy=30
    x=6,y=5

    check:
    xy = 6*5 = 30
    2xy = 12*5 = 60 = 30+30

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