Question

Масса 1 бензина 690 г, а масса 1 л керосина 790 грамм.Найди 1) массу бензина в чытерёх пол-литровых банках; 2) массу керосина в трёх такихже банках

Answer 1

690:2=345(бенз)-0,5л
345*4=1380(бенз)-2л
790:2=395(керос)- 0,5л
395*3= 1185(керос)-1,5л

Answer 2

Calculating the Mass of Gasoline and Kerosene in Containers

To calculate the mass of gasoline in four half-liter containers and the mass of kerosene in three similar containers, we can use the given mass of 1 liter of each substance.

1. Mass of Gasoline in Four Half-Liter Containers: - The mass of 1 liter of gasoline is 690 grams. - To find the mass of gasoline in four half-liter containers, we can use the formula: \[ \text{Mass} = \text{Volume} \times \text{Density} \] where the volume is in liters and the density is in grams per liter.

- Using this formula, the mass of gasoline in four half-liter containers is: \[ \text{Mass} = 0.5 \, \text{liters} \times 690 \, \text{grams/liter} \times 4 \]

- Calculating the mass: \[ \text{Mass} = 0.5 \, \text{liters} \times 690 \, \text{grams/liter} \times 4 = 1380 \, \text{grams} \]

The mass of gasoline in four half-liter containers is 1380 grams.

2. Mass of Kerosene in Three Half-Liter Containers: - The mass of 1 liter of kerosene is 790 grams. - Using the same formula as above, the mass of kerosene in three half-liter containers is: \[ \text{Mass} = 0.5 \, \text{liters} \times 790 \, \text{grams/liter} \times 3 \]

- Calculating the mass: \[ \text{Mass} = 0.5 \, \text{liters} \times 790 \, \text{grams/liter} \times 3 = 1185 \, \text{grams} \]

The mass of kerosene in three half-liter containers is 1185 grams.