A rocket of mass 20kg has 180 kg of fuel. The exhaust velocity of fuel is 1.6 km/sec. Calculate the ultimate velocity of the rocket gained, when the rate of consumption of the fuel is 2kg/sec. (neglect gravity)

Options

A. 3.7 km/sec
B. 2 km/sec
C. 10 km/sec
D. 5 km/sec

Answer

A