A submarine can be treated as an ellipsoid with a diameter of 5 m and a length

Question:

A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of 25 m. Determine the power required for this submarine to cruise horizontally and steadily at 40 km/h in seawater whose density is 1025 kg/m³. Also determine the power required to tow this submarine in air whose density is 1.30 kg/m³. Assume the flow is turbulent in both cases.

40 km/h Submarine