SOLUTION: Square corners, 6 cm on a side, are removed from a 36cm by 42cm piece of cardboard. the cardboard is then folded to form an open box. What is the urface area of the inside of the b

Question 270921: Square corners, 6 cm on a side, are removed from a 36cm by 42cm piece of cardboard. the cardboard is then folded to form an open box. What is the urface area of the inside of the box?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Square corners, 6 cm on a side, are removed from a 36cm by 42cm piece of cardboard.
the cardboard is then folded to form an open box.
What is the surface area of the inside of the box?
:
Find the dimensions of the open box:
(36-12) by (42-12) by 6
24 by 30 by 6 are the dimensions
:
SA = (24*30) + 2(24*6) + 2(30*6)
:
SA = 720 + 2(144) + 2(180)
:
SA = 720 + 288 + 360
:
SA = 1368 sq/cm
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