What is the water pressure supplied to a building of the shower heads are 30 meters above the supply line, the pipe is 1 centimeter in diameter (id) galvanized iron pipe. Re=10,000 and the flow speed through the pipe is 1.12 meters/second. The length of the pipe is 75 meters with 16 threaded regular 90 degree elbows and the shower head has a K(sub L)= 6.