Question:
If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is _______ cm.
Solution:
Thickness of pile of 12 cardboard sheets = 45mm
Thickness of 1 cardboard sheet = 45/12 mm
Hence, thickness of a pile of 240 sheets = (45/12)×240
= 45 × 20 = 900mm
= 900/10 cm = 90cm