12. Tabla de conversiones 06/03/11 1 in( pulgada) = 2,54 cm = 0,025 4 m 1 ft( pie) = 12 in 1 ft = 0,304 8 m 1 yd ( yarda) = 3 ft = 36 in 1 yd = 0,914 4 m 1 mi( milla) = 5 280 ft = 1 760 yd 1 mi = 1,609 km 1 lb (libra) = 4,45 N 1 hp = 550 ft lb /s = 746 W 1 atm = 14,7 lb/in 2