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May 26, 2015

Homework Help: mathematics

Posted by Ruby on Monday, August 29, 2011 at 8:27am.

Please help me answer this question;

1.A metal gutter open at the tops and ends, is bent up from material 30 cm wide to form a rectangular cross section.
a) If the base of the gutter is x cm wide, find the height of the gutter.
b)Show that the area of the gutter cross section is given by A = 15x - x^2/2.

Thanks.

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