Question

4 печи выплавили 600 000 тонн стали.первая печь выплавила две пятых всего количество стали, вторая -три четвёртых того количество которое дала первая печь третья - одну десятую часть того что дали первая и вторая печи вместе сколько тонн стали дала четвёртая печь? помогите плиз даю 25балов

Answer 1

Первая печь: 600000*2/5 = 240000 т
вторая печь : 240000*3/4 = 180000 т
первая + вторая = 240000+180000 = 420000 т
третья печь: 420000:10 = 42000 т
первая + вторая + третья = 420000 + 42000 = 462000 т
четвертая печь: 600000-462000 = 138000 т

Answer 2

Calculation of Steel Output by Four Furnaces

To calculate the amount of steel produced by the fourth furnace, we need to consider the information provided about the first three furnaces.

According to the information given: - The first furnace produced two-fifths of the total amount of steel. - The second furnace produced three-fourths of the amount produced by the first furnace. - The third furnace produced one-tenth of the combined amount produced by the first and second furnaces.

We are given that the total amount of steel produced by the four furnaces is 600,000 tons.

Let's calculate the amount of steel produced by each furnace step by step:

1. The first furnace produced two-fifths of the total amount: - Amount produced by the first furnace = (2/5) * 600,000 tons = 240,000 tons.

2. The second furnace produced three-fourths of the amount produced by the first furnace: - Amount produced by the second furnace = (3/4) * 240,000 tons = 180,000 tons.

3. The third furnace produced one-tenth of the combined amount produced by the first and second furnaces: - Combined amount produced by the first and second furnaces = 240,000 tons + 180,000 tons = 420,000 tons. - Amount produced by the third furnace = (1/10) * 420,000 tons = 42,000 tons.

Now, let's calculate the amount of steel produced by the fourth furnace:

- Total amount produced by the first three furnaces = 240,000 tons + 180,000 tons + 42,000 tons = 462,000 tons.

To find the amount produced by the fourth furnace, we subtract the total amount produced by the first three furnaces from the total amount of steel produced by all four furnaces:

- Amount produced by the fourth furnace = 600,000 tons - 462,000 tons = 138,000 tons.

Therefore, the fourth furnace produced 138,000 tons of steel.

Please note that the calculations are based on the information provided and assume that the proportions mentioned for each furnace are accurate.