Thrust of liquid oxygen - liquid hydrogen rocket engine is $300 \mathrm{kN}$. The O/F ratio used is 5 . If the fuel mass flow rate is $12.5 \mathrm{~kg} / \mathrm{s}$, the specific impulse of the rocket motor in $\mathrm{Ns} / \mathrm{kg}$ is
(A) 3800
(B) 4000
(C) 4200
(D) 4400

Question ID - 1 :-

Thrust of liquid oxygen - liquid hydrogen rocket engine is $300 \mathrm{kN}$. The O/F ratio used is 5 . If the fuel mass flow rate is $12.5 \mathrm{~kg} / \mathrm{s}$, the specific impulse of the rocket motor in $\mathrm{Ns} / \mathrm{kg}$ is
(A) 3800
(B) 4000
(C) 4200
(D) 4400

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