29.16 square feet.
12.25 square feet.
10.5 square feet.
42 = 3.5 feet 120 = 10 feet 3.5 x 10 = 35 square feet
12.25 ft2
= ( 20/12) x (42/12) sq feet
12.83 square feet.
4.6667 square feet.
It depends on whether you mean 78 inches by 42 inches or 78 inches by 42 feet or miles or whatever.
42 inches = 3.5 feet48 inches = 4 feetThe area of a rectangle that measures (42" by 48") is (3.5 x 4) = 14 square feet.
measure your length and your width of the area. Convert the inches to feet before or after you multiply the length times the width. That gives you your square feet.for example, if you have measurements of 36 inches and 42 inches you can multiply 36 x 42 then convert to feet or convert first by dividing your units by 12...36 inches / 12 inches per foot = 3 ft.42 inches / 12 inches per foot = 3.5 ft.3 feet x 3.5 feet = 10.5 square feet
42 If you are talking about a square yard, 36 inches x 36 inches = 1296 square inches or 9 square feet.
42 inches is 3 feet 6 inches