Question 1099795
{{{V[w]= (3/5)(25)(18)(30) =8100}}}
The tank is full when it has {{{25*18*30=13500}}}{{{cc}}} in it. 
So it is half full when it has {{{13500/2=6750}}}{{{cc}}} in it.
If you had to add 950cc to get to 6750cc, then there was {{{6750-950=5800}}}{{{cc}}} in the tank.
So the difference between 8100cc and 5800cc was the amount that went into both containers.
{{{2*V[c]=8100-5800}}}
{{{V[c]=2300/2}}}
{{{V[c]=1150}}}{{{cc}}}