Question 271147: A BOX MEASURES 40CM*50CM*45CM .FIND THE AREA OF THE CARD BOARD REQUIRED TO MAKE 350BOXES Found 3 solutions by mananth, ikleyn, josgarithmetic:Answer by mananth(16949) (Show Source):
the area of one surface is 40 * 45
The area of the adjacent surface is 45* 50
In a rectangle or square there are 8 faces .
4*40*45 + 4*45*50
= 7200 + 9000 = 16200 sq. cms
For 350 boxes the area required will be 350 * 16200= 5,670,000 square cms.
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A BOX MEASURES 40CM*50CM*45CM .FIND THE AREA OF THE CARD BOARD REQUIRED TO MAKE 350BOXES
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The problem is posed in inaccurate way. It should be retold (reformulated) in other way.
Simply speaking, they want you find the surface area of one single box and then
multiplied the single area by 350.
The solution by @mananth is fatally wrong. For example, he writes
"In a rectangle or square there are 8 faces."
It is the case when the artificial intelligence works perpendicularly to common sense.
I came to bring a correct solution.
The surface area of one rectangular box is
2*(ab + ac + bc) = 2*(40*50 + 40*45 + 50*45) = 12100 cm^2.
The surface area of 350 boxes is 350 * 12100 = 4235000 cm^2 = 423.5 m^2. ANSWER
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