Question 1091686
{{{(2/5)*5000=2000}}} units of volume in the tank initially.


Recharges:  {{{(1/4)5000+(1/8)5000=1875}}} units to be added.
After the recharges done, 3875 units in the tank.


During the week, use {{{1/5}}} of capacity.
{{{3875-(1/5)5000}}}
{{{3875-1000}}}
2875 units of water will remain.