The perimeter of a rectangular notecard is 16 inches. The notecard is 5 inches wide. How tall is it?

Discussion in 'Calculator Requests' started by math_celebrity, Oct 16, 2018.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    The perimeter of a rectangular notecard is 16 inches. The notecard is 5 inches wide. How tall is it?

    Perimeter of a rectangle P is:
    P = 2l + 2w

    We have:
    2l + 2w = 16

    We are given w = 5, so we have:
    2l + 2(5) = 16
    2l + 10 = 16

    Plugging this into our equation calculator, we get l = 3.
     

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