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.

I'll be glad to check your answer.

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.

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

waste amount=25 (10% of 250)

250+25=275

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

To calculate how much cardboard you need, you first need to calculate the surface area of the box.

The surface area of a rectangular box is given by the formula:

2lw + 2lh + 2wh

where l, w, and h are the length, width, and height of the box respectively.

In this case, the box measures 10 cm by 5 cm by 5 cm, so plugging these values into the formula, we have:

2(10)(5) + 2(10)(5) + 2(5)(5) = 100 + 100 + 50 = 250 cm²

Now, we need to account for the 10% wastage in the cutting process. To do this, we need to add 10% of the surface area to the total surface area.

10% of 250 cm² is 25 cm². Adding this to the total surface area, we have:

250 + 25 = 275 cm²

Therefore, you need 275 cm² of cardboard to make the box.

The correct answer is 275 cm.