Question

Масса 1л бензина 690г, а масса 1л керосина 790 г. Найди 1) массу бензина в четырёх пол-литровых банках ; 2) массу керосина в трёх таких же банках пожалуйста помогите я уже 3 часа думаю не могу решить

Answer 1

1) 4 по 0,5л это 2л значит 2л х 690г = 1380 масса бензина.  
2) 3 по 0,5 это 1,5л значит 1,5 х 790г. = 1185 масса керосина.

Answer 2

1.690гр./ 1000= 0,69(гр) плотность бензина
2.0,69х 2= 1кг 38гр в 4 банках бензина
4.790/1000=0,79гр. плотность керасина
5.0,79х 1,5 = 1кг 185гр. в 3 банках керосина

Answer 3

Calculation of the Mass of Gasoline in Four Half-Liter Cans

To find the mass of gasoline in four half-liter cans, we need to first determine the mass of gasoline in one can and then multiply it by four.

Given that the mass of 1 liter of gasoline is 690 grams, we can calculate the mass of gasoline in one can as follows:

Mass of gasoline in one can = (Mass of 1 liter of gasoline / Volume of 1 can) * Volume of 1 can

The volume of one can is half a liter, so the calculation becomes:

Mass of gasoline in one can = (690 grams / 1 liter) * 0.5 liters

Simplifying the equation:

Mass of gasoline in one can = 345 grams

Now, to find the mass of gasoline in four half-liter cans, we multiply the mass of one can by four:

Mass of gasoline in four half-liter cans = 345 grams * 4 = 1380 grams

Therefore, the mass of gasoline in four half-liter cans is 1380 grams.

Calculation of the Mass of Kerosene in Three Half-Liter Cans

Similarly, to find the mass of kerosene in three half-liter cans, we follow the same process.

Given that the mass of 1 liter of kerosene is 790 grams, we can calculate the mass of kerosene in one can as follows:

Mass of kerosene in one can = (Mass of 1 liter of kerosene / Volume of 1 can) * Volume of 1 can

The volume of one can is half a liter, so the calculation becomes:

Mass of kerosene in one can = (790 grams / 1 liter) * 0.5 liters

Simplifying the equation:

Mass of kerosene in one can = 395 grams

Now, to find the mass of kerosene in three half-liter cans, we multiply the mass of one can by three:

Mass of kerosene in three half-liter cans = 395 grams * 3 = 1185 grams

Therefore, the mass of kerosene in three half-liter cans is 1185 grams.

I hope this helps! Let me know if you have any further questions.