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March 25, 2017

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The lenght and the width of a rectangle are in the ratio 3:2. If the lenght is increased by 20 and the width is decreased by 5, the ratio of the lenght to the width becomes 2:1. Find the lenght and width of this rectangle.

  • math - ,

    l/w=3/2
    or w=2l/3

    (l+20)/(w-5)=2
    l+20=2w-10
    l+20=4l/3 -10
    1/3 l=30
    l=90
    w=60

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