Oil (cv = 1.8 kJ/kg-K, = 910 kg/m3) flows steadily through a long insulated constant-diameter pipe

Question:

Oil (cv = 1.8 kJ/kg-K, ρ = 910 kg/m3) flows steadily through a long insulated constant-diameter pipe at a volume flow rate of 10 m3/min. The conditions at the inlet are p = 3000 kPa, T = 20oC, V = 20 m/s and z = 100 m. The conditions at the exit are p = 2000 kPa and z = 0 m.
(a) Evaluate the velocity (V) at the exit.
(b) Determine the exit temperature (T2).