Water at 15°C flows at 4 m/sec in a 15 cm diameter pipe. At what velocity must oil at 30°C flow in a 7.5 cm diameter pipe for the two flows to be dynamically similar? Take kinematic viscosity for water at 15°C as 1.145 ´ 10-6 m2/ sec and that for oil at 3.010–6m2/ sec.