Question $3$

A spacecraft engine uses LOX and Methane at O$//$F$=3\mathrm{.}5$ with excellent C$^(**)$

efficiency. Calculate the initial mass of the spacecraft if the dry mass of the

spacecraft is $62000$ kg $.$ Assume that the thrust coefficient is $0\mathrm{.}8$ and DeltaV is $1\mathrm{.}1$

km$//$s$.$ Round your answer to the nearest whole number in m$//$s$,$ then enter it

into the textbox below without including any other characters. Show your work

step by step and submit it into the drpbox.

answer is correct just need correct work