Question

If the thickness of a pile of 12 cardboard sheets is 45 mm, then how many sheets of same cardboard would be 90 cm thick?

Answer 1

Here we have 12 cardboard sheets have a width of 45 mm.
So 1 cardboard sheet will be 3.75 mm thick.
90 cm = 900mm
So, there will be 900/3.75=240 sheets required.