# Interview question

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?

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

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3. 👁 190

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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

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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