3. An airplane (mass 10,000 kg, wing span 29.41 m, and wing area 91.70 m²) travels at 120 knots at an altitude of 18,000 ft. Its wing uses an airfoil

with a lift slope of 0.1 deg^-1. The airplane has 1,500 kg of fuel on board, which is part of its total mass. The BSFC is 3 N/kWh. The propellers have an efficiency of 85%. Assume Lift-To-Drag ratio of 17. Calculate its total range in km, consisting of (i) powered flight and (ii) gliding. (8 points)