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You are going to make a box out of cardboard. The box needs to measure 10 cm by 5 cm by 5 cm; 10% of the final product will be wasted in the cutting process. How much cardboard do you need?

Multiple choice answers are:

125 cm.
140 cm.
200 cm.
250 cm.
275 cm.

  1. 👍 0
  2. 👎 0
  3. 👁 190
  1. I'll be glad to check your answer.

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    Ms. Sue
  2. surface area of a six sided box:

    10x5*2+5x5*2+10x5*2

    which is 250. So you need the excess added,

    Amount-waste=250
    .9amount=250
    amount=about 278cm^2

    check: 278*.9=250

    I wonder if the box is supposed to have a lid, I put that in the calculations.

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    bobpursley
  3. "10x5*2+5x5*2+10x5*2"

    waste amount=25 (10% of 250)

    250+25=275

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  4. alx is correct. it does say 25 percent of the final product, not as I read 25 percent of the material used...

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    bobpursley

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