294
21 ft * 10 ft = 210 sq ft = 19.51 sq metres.
11 ft * 13 ft = 143 sq. ft, so the room has an area of 143 sq. ft
approx. 172.5 square feet
12 in = 1 ft → 11ft 8in x 11ft 3 in = 118/12 ft x 113/12 ft = 112/3 ft x 111/4 ft = 35/3 ft x 45/4 ft = 525/4 sq ft = 1311/4 sq ft = 131.25 sq ft
294
110 sq ft
882 square feet.
21 ft * 10 ft = 210 sq ft = 19.51 sq metres.
13ft * 11ft = 143 Sq feet.143 square foot = 13.28513472 square meter
11 ft * 13 ft = 143 sq. ft, so the room has an area of 143 sq. ft
121 sq ft
10 ft x 11 ft = 110 ft2 110 ft2 = 10,21933 m2
approx. 172.5 square feet
12 in = 1 ft → 11ft 8in x 11ft 3 in = 118/12 ft x 113/12 ft = 112/3 ft x 111/4 ft = 35/3 ft x 45/4 ft = 525/4 sq ft = 1311/4 sq ft = 131.25 sq ft
A rectangle that measures 19-ft by 11-ft has an areaof 209 square feet = 19.42 square meters (rounded)
Length times width gives you the answer, surely you can do 11X 12 in your head or on your phone....