Asked by Shicko
                A rectangular swimming pool is 10m wide and 15m long. The pool is surrounded by a deck of uniform width, whose area is equal to the area of the pool. How wide is the deck?
            
            
        Answers
                    Answered by
            oobleck
            
    So the pool plus the deck is twice the area of the pool ...
(10+2w)(15+2w) = 2(10*15)
    
(10+2w)(15+2w) = 2(10*15)
                    Answered by
            R_scott
            
    (10 + 2 w) (15 + 2w) = 2 * 10 * 15
150 + 50 w + 4 w^2 = 300
2 w^2 + 25 w - 75 = 0
(2 w - 5) (w + 15) = 0
2 w - 5 = 0
w + 15 = 0
    
150 + 50 w + 4 w^2 = 300
2 w^2 + 25 w - 75 = 0
(2 w - 5) (w + 15) = 0
2 w - 5 = 0
w + 15 = 0
                    Answered by
            Jah'vaiyah
            
    1500 sq cm
    
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