The perimeter of a rectangular shelf is 60 inches. The shelf is 7 inches deep. How wide is it?

Discussion in 'Calculator Requests' started by math_celebrity, Apr 15, 2019.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    The perimeter of a rectangular shelf is 60 inches. The shelf is 7 inches deep. How wide is it?

    The perimeter for a rectangle is given below:
    P = 2l + 2w

    We're given l = 7 and P = 60. Plug this into the perimeter formula:
    60 = 2(7) + 2w
    60 = 14 + 2w

    Rewritten, it's 2w + 14 = 60.

    Typing this equation into our search engine, we get w = 23.
     

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