A room has an area of 121ft2 but carpeting is only sold in m2. How much carpeting is needed to carpet the room?

Answer 1

The math is called dimensional analysis and depends on the Multiplicative Identity (that is, 1). Any number multiplied by 1 remains the same (but the units may change).

1 = ( ( 3 ft) / (1 yard) ) = ( (1 yard) / (3 ft) ) [choose the one that allows units to cancel)

1 = ((3.28 ft) / (1 meter) ) = ( (1 meter) / (3.28 ft) )

121 ft²

121 (ft)*( (1 meter) / (3.28 ft) ) * (ft)( (1 meter) / (3.28 ft) )

121 / (3.28*3.28) m²

11.25 m²