Question

ДАМ 30 БАЛОВ 83.  В сосуде А 26 литров, а в сосуде Б 34 литра. Сколько литров нужно перелить из сосуда Б в сосуд А, чтобы в обоих было равное количество жидкости? 84.  Если4,5 м материала стоят 90 рублей, тоЗ,5 мстоят...? 85. Запасов продовольствия для 12 человек хватает на 15 дней. На сколько дней хватит этого запаса для 6 человек? 86.  Для выполнения уличных работ троим рабочим понадобилось 12 дней. За сколько дней выполнят эту работу 6 рабочих? 87.  Для сплава берут две части меди и одну часть цинка. Сколько граммов цинка понадобится для получения 45 грамм сплава? ​

Answer 1

Ответ:

1(задача ) 34-26=18(л)

Объяснение:

Answer 2

Problem 83: Transferring liquid between two containers

To find out how many liters need to be transferred from container B to container A in order to have an equal amount of liquid in both containers, we need to calculate the difference in the volumes of the two containers and divide it by 2.

Container A has a volume of 26 liters, and container B has a volume of 34 liters.

To find the difference in volumes, we subtract the volume of container A from the volume of container B: 34 - 26 = 8 liters.

To have an equal amount of liquid in both containers, we need to transfer half of this difference from container B to container A.

Therefore, we need to transfer 4 liters from container B to container A.

Problem 84: Calculating the cost of material

If 4.5 meters of material cost 90 rubles, we can calculate the cost of 5.5 meters of material using a proportion.

Let's set up the proportion:

4.5 meters / 90 rubles = 5.5 meters / x rubles

To solve for x, we can cross-multiply and then divide:

4.5 * x = 90 * 5.5

x = (90 * 5.5) / 4.5

x ≈ 110 rubles

Therefore, 5.5 meters of material will cost approximately 110 rubles.

Problem 85: Calculating food supply duration

If the food supply is sufficient for 12 people for 15 days, we can calculate how long it will last for 6 people using a proportion.

Let's set up the proportion:

12 people / 15 days = 6 people / x days

To solve for x, we can cross-multiply and then divide:

12 * x = 15 * 6

x = (15 * 6) / 12

x = 7.5

Therefore, the food supply will last for 7.5 days for 6 people.

Problem 86: Calculating work duration

If it took 12 days for 3 workers to complete a task, we can calculate how long it will take for 6 workers to complete the same task using a proportion.

Let's set up the proportion:

3 workers / 12 days = 6 workers / x days

To solve for x, we can cross-multiply and then divide:

3 * x = 12 * 6

x = (12 * 6) / 3

x = 24

Therefore, it will take 24 days for 6 workers to complete the task.

Problem 87: Calculating the amount of zinc needed for an alloy

To calculate the amount of zinc needed to obtain a 45-gram alloy with a ratio of two parts copper to one part zinc, we need to determine the weight of zinc required.

Let's set up the proportion:

2 parts copper / 1 part zinc = 45 grams / x grams

To solve for x, we can cross-multiply and then divide:

2 * x = 1 * 45

x = 45 / 2

x = 22.5

Therefore, 22.5 grams of zinc will be needed to obtain a 45-gram alloy.