Three feet.
Three of them.
11 feet
There are three feet in one yard.
three feet
A cubic yard is three feet high, three feet wide and three feet thick.
Three feet to a yard, so 9 yards is 27 feet.
3 yards are 9 feet.
24 cubic feet
3 feet is equal to 1 yard or 36 inches
There are three feet in a yard, so 12 feet = 4 yards.
Three feet is 91.44cm