Question

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

Answer 1

Answer:

240

Step-by-step explanation:

it is direct proportion so first we convert the 90 cm into millimetre

90cm = 900 mm

let the number of sheet x

12/45 = x/900

= 240

240 sheets of the same cardboard would be 90cm thick