Question
what is the total surface (in square units) of an open-topped box with dimensions L*W*H =9*7*6
Answers
Henry
As = L*W + 2W*h + 2*L*h
As = 9*7 + 2*7*6 + 2*9*6 = 255 U^2.
As = 9*7 + 2*7*6 + 2*9*6 = 255 U^2.