How several square foot of space will a daypack of mulch 3 cubic foot within size cover next to a bulk of 3 inches?

Answers: 12 square feet

Think more or less it...3 cubic feet is similar to a box that is 12" by 12" and 3 foot high. Now slice that box from top to bottom into 3" slices- respectively slice is equal to one square foot, 3 inches thick. How tons slices do you get?? 12!