How many square feet are in 9by30by2?

Answer 1

This question has no meaningful answer.

Firstly, 9by30by2 is a cubic measure - a measure of a volume, in 3 dimensions. Square feet are a 2-dimensional measure of area. Basic dimensional analysis teaches that you cannot convert a 3-d measure to a 2-d measure without additional information.

In any case, the units for 9by30by2 are not given. Are they feet, metres, miles, nanometres or lighyears?