A brewery has a grain silo with a 5.0 × 104 lbm capacity to store malted barley. A truck delivers 15800 lbm of malted barley to the grain silo. The malted barley is blown from the bottom of the truck at h1 = 1.60 ft to the top of the silo at h2 = 44.0 ft with a pump that can provide 3.50 kW of power. How long will it take to unload the whole truck into the silo