Question

Rocket fuel is capable of giving an exhaust velocity of $v_{\text{rel}}=2.4km/s$ in the absence of any external forces. The fuel required per kg of the payload to provide an exhaust velocity of $12km/s$ to the rocket is

• A. $3670kg$
• B. $8000kg$
• C. $147.4kg$
• D. $478.4kg$

Answer 1

The correct option is C $147.4kg$