Question 1073508
The regular house consumes the oil at a rate  {{{2200/3}}} LITERS per WINTER.


The new insulated house consumes at an unknown rate, r, in LITERS per WINTER.


The two houses consumed 1700 liters in 2 winters.


{{{highlight_green((2200/3+r)*2=1700)}}}


Solve for r, and THEN use it to answer the question of how many winters for it to consume 1150 L of oil.


{{{r=1700/2-2200/3}}}


{{{r=850-2200/3}}}


{{{highlight_green(r=350/3)}}}, or about {{{highlight_green(116&2/3)}}} LITERS per WINTER.



How many winters insulated house consume 1150 L?

{{{1150*L*(3/350)(W/L)}}}

{{{highlight(9.9*WINTERS)}}}