Question

Масса сплава из меди и олова 720грамм отношение массы меди к массе олово и сплава равно 7:5 сколько граммов меди и олова содержится в сплаве

Answer 1

1) 7+5=12 частей в сплаве2) 720:12= 60 грамм масса1 части сплава3) 7*60=420 грамм масса меди4) 5*60=300 грамм масса олова

Answer 2

Calculation of Copper and Tin Mass in the Alloy

To find out how many grams of copper and tin are present in the alloy, we need to use the given ratio of copper to tin in the alloy, which is 7:5.

Let's assume the mass of copper in the alloy is 7x grams and the mass of tin is 5x grams. According to the given information, the total mass of the alloy is 720 grams.

We can set up the following equation to represent the relationship between the masses:

7x + 5x = 720

Simplifying the equation, we get:

12x = 720

Dividing both sides of the equation by 12, we find:

x = 60

Now, we can substitute the value of x back into the equation to find the mass of copper and tin in the alloy:

Mass of copper = 7x = 7 * 60 = 420 grams

Mass of tin = 5x = 5 * 60 = 300 grams

Therefore, the alloy contains 420 grams of copper and 300 grams of tin.