SOLUTION: an oopened topped box has a square base (bottom) and a height of 7cm. if the surface area of the five sides of the box is 165 cm squared, find the simensions of the square base.

Question 35716: an oopened topped box has a square base (bottom) and a height of 7cm. if the surface area of the five sides of the box is 165 cm squared, find the simensions of the square base.
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
an oopened topped box has a square base (bottom)....SAY EQUAL TO A
and a height of 7cm. if the surface area of the five sides of the box is 165 cm squared, find the simensions of the square base.
S.A.=BASE AREA +4 SIDES
165=A^2+4*7*A=A^2+28A
A^2+33A-5A-165=0
A(A+33)-5(A+33)=0
(A-5)(A+33)=0
A=5
SQUARE BASE IS 5 AND 5 SIZE
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