SOLUTION: A poster is 25cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5cm border on all sides. If the area of the border alone is 1350cm^2, what are the
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Question 174170: A poster is 25cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5cm border on all sides. If the area of the border alone is 1350cm^2, what are the dimensions of the poster?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
lets call the width x and the length y=x+25 of the poster......the cardboard area minus the poster area would give us the area of the border(which is 1350).
the cardboard area would be (x+5)(x+25+5)=(x+5)(x+30)=
the area of the poster is x(x+25)=
:
so =
:
cm in width
:
cm in length
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