Reservoir + water

The reservoir filled with water weighs 12 kg and after pouring off three-quarters of the water weights 3 kg. Calculate the weight and volume of the reservoir.

Correct answer:

m =  0 kg
V =  12 l

Step-by-step explanation:

ρ=1 kg/l mH2O=VH2O

m+V = 12
12-3/4•V = 3

V+m = 12
3V = 36

V = 12
m = 0

Our linear equations calculator calculates it.

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