Question

A box whose dimensions are 80cm*50cm*25cm is to be painted from outside. Then how many paint boxes are required, if one paint box covers an area of 100cm square?

Answer 1

Dimensions of box = 80*50*25
Area painted =
$2(4000 + 5000 +2000) \\ 2(11000) \\ 22000$
It's given that 100cm^2 = 1paint box
22000/100
220 boxes of paint are required...