The amount of water that can be pumped from the aquifer to balance the budget is 30 m³.
Material Balance
The principles of material balance states that, the total mass of an isolated system is always conserved.
Mass (in) = Mass (out)
Water pumped from the aquifer
The water pumped from the aquifer can be determined by applying the principle of material balance.
10 + m = 40
m = 40 - 10
m = 30 m³
Thus, the amount of water that can be pumped from the aquifer to balance the budget is 30 m³.
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