Answer
4.1 liters/meter
0.018 liters/year
2.7 liters
Work Step by Step
$V = 4.1H - 0.018A - 2.7$
Since volume V is in liters, then the units of each of the three terms on the right side of the equation must be liters.
The units of 4.1 must be liters/meter, then the units of 4.1H are (liters/meters)(meters) = liters.
The units of 0.018 must be liters/year, then the units of 0.018A are (liters/year)(years) = liters.
The units of 2.7 must be liters.