SOLUTION: a poaster is 25 cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5 cm boarder on all sides. If the area of the boarder alone is 1350 cm2, what ar
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Question 360568: a poaster is 25 cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5 cm boarder on all sides. If the area of the boarder alone is 1350 cm2, what are the dimensions of the poster? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! a poaster is 25 cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5 cm boarder on all sides. If the area of the boarder alone is 1350 cm2, what are the dimensions of the poster?
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width = w
length = w+25
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width including border = w+10
length including border= w+25+10=w+35
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(w+10)(w+35)-w(w+25)=1350
w^2+45w+350 -w^2-25w=1350
20w+350=1350
20w=1350-350
20w=1000
w=50 cm the width of poster
length = w+25=75 cm
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m.ananth@hotmail.ca
