use an equation of ratios to determine the amount of gas needed to fill the tank.
0.2 0.8
=
288.75 x
231 gal
so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.
0.2
it would take 1155 gal. to fill the tank.
the cost would be
1155 gal $3
* = $3465 (answer)
1 1 gal
hope this you