# Reservoir + water

Reservoir completely filled with water weighs 12 kg. After pouring off three quarters of the amount of water weights 3 kg. Calculate the weight and volume of the reservoir.

Result

m =  0 kg
V =  12 l

#### Solution:

$\rho = 1 \ kg/l \ \\ m_{H2O} = V_{ H2O}$

m+V = 12
12-3/4*V = 3

V+m = 12
3V = 36

V = 12
m = 0

Calculated by our linear equations calculator.

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