20.9 sq. meters
1 foot = 30.48 cm
15 feet = 457.2 cm or 4.572 meters
4.572m x 4.572m = 20.9 sq. m.
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If the room is rectangular - the usual case - multiply the length times the width. If length and width are in meters, the area will be in square meters; if length and width are in feet, the area will be in square feet, etc.
~32.6
Using a metric tapemeasure,multiply the length of your rectangle by the width.
to calculate square feet its width X length 10x35 =350 or 20x17.5 =350
Square feet = length by width ONLY Cubic feet = length by width by height Square feet = 16 x 16 = 256 square feet Cubic feet = 16 x 16 x 16 = 4096 cubic feet