A rocket has an initial mass of 150 kg. After operating for a duration of 10 s, its final mass is 50 kg

Q. A rocket has an initial mass of 150 kg. After operating for a duration of 10 s, its final mass is 50 kg. If the acceleration due to gravity is 9.81 m/s² and the thrust produced by the rocket is 19.62 kN, the specific impulse of the rocket is

(A) 400 s                                          

(B) 300 s

(C) 200 s                             

(D) 100 s

Ans: 200 s