7) Ethanol (u=1.2 x 10-³ Pa*s, p= 788 kg/m³ at 20°C) flows from tank A to tank B via a

galvanized iron circular pipe with a diameter of 7.5 cm. The pipeline is 16m long and

contains two 90° elbows. Tank A is 2 m higher than tank B. Both tanks are open to the

atmosphere. Determine the volumetric flow rate (m³/s) of ethanol.