Let us consider the thickness of a pile of a cardboard as ‘x’
| No. of cardboard | 12 | 294 |
| Thickness (cm) | 3.5 | x |
12/3.5 = 294/x
By cross-multiplying
12x = 294(3.5)
12x = 1029
x = 1029/12
= 85.75
∴ The thickness of a pile of 294 cardboards is 85.75 cm.
