Weight is 1 l of gasoline of 690 g, and weight is 1 l of kerosene of 790 g. Find: 1) the mass of gasoline in four half-liter banks; 2) the mass of kerosene in three same banks. I ask help! The decision is necessary to me for the fourth class.

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1) (690/2) *4=1380(g) - 4 half-liter cans of gasoline 2) 790/2=395(l) - in one half-liter can of kerosene 3) 395*3=1185(g) - in 3 half-liter banks of kerosene of Answer: 1380 grams of gasoline, 1185 grams of kerosene.
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Answer add