Barrel 2

Empty barrel weighs 7 kg. When it filled with water up to 45% height, weighs 60 kg. How heavy is barrel full of water?

Correct result:

x =  124.8 kg

Solution:

60=7+45/100v v=(60−7)⋅2.222=117.778 kg  x=7+v=7+117.778=124.8 kg

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