A centrifugal fan is used to pump air. The fan rotor is 1 ft in diameter, and the blade spacing is 2 in. The air enters with no angular momentum and exits radially with respect to the fan rotor. The discharge is 1500 cfm. The rotor spins at 3600 rpm. The air is at atmospheric pressure and temperature of 60°F. Neglect the air compressibility. Calculate power (hp) required to operate the fan.