A Saturn V Rocket with an Initial Mass M₀ of 3

Multiple Choice

A Saturn V rocket with an initial mass m₀ of 3 $\times$ 10⁶ kg has a payload that accounts for 27% of this mass,a burn rate of 15 $\times$ 10³ kg/s,and a thrust F_th of 35 $\times$ 10⁶ N.The burn time t_b is

A) 135 s
B) 185 s
C) 209 s
D) 233 s
E) 146 s