I don't know much imperial, but that's 10 feet 11 inches right?
If so then it is 10 feet + 11/12 feet or approx 10.917 feet.
142"/12" = 11.8333333....ft. (or 11 ft. and 10 inches).
11 ft = 3.35 metres
11 ft 7 inch is 3.5306 meters 10 ft 10 inc is 3.3528 meters so the area is 3.5306*3.3528=11.8374 sq meters
11 ft.
10 * 10 = 100 square feet!
10 ft * 11 ft = 10*11 = 110 square feet.
110
142"/12" = 11.8333333....ft. (or 11 ft. and 10 inches).
110
It is not possible to answer the question without knowing whether the patio is 11 ft x 10 ft or 11 yards *10 yards etc.
18-ft x 11-ft = 198 square ft
how many ft is 11 yds
11 ft = 3.35 metres
11 ft 7 inch is 3.5306 meters 10 ft 10 inc is 3.3528 meters so the area is 3.5306*3.3528=11.8374 sq meters
11 * 16 = 176 square feet
11 ft.
10 * 10 = 100 square feet!