Pour water into an empty bottle with a cup. If you pour 2 glasses of water, the total weight of the bottle will be 240 grams. If you pour 6 glasses of water, the total weight of the bottle is 600 grams. If you pour 3 glasses of water, how much will it weigh? The weight of a bottle of water = (600-240) ÷ (6-2) = 360 ÷ 4 = 90g.

Bottle weight = 240-2× 90 = 60g.

Pour three glasses of water and a bottle * * * Weight = 60+90× 3 = 330g.

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