Question

Руда вмещает 65%железа.сколько руды нужно чтобы получить 3120кг железа?

Answer 1

3120кг это 100%.
Х кг это 65%.
х=(3120*65)/100=2028 килограммов.

Удачи.

Answer 2

To calculate the amount of ore needed to obtain 3120 kg of iron, we can set up a simple proportion based on the iron content in the ore.

Let x be the amount of ore required in kilograms.

Given that the ore contains 65% iron, we can say that 65% of x should be equal to 3120 kg of iron.

Mathematically, this can be expressed as:

0.65x = 3120

Now, to find the value of x, divide both sides of the equation by 0.65:

x = 3120 / 0.65 x = 4800 kg

So, you would need 4800 kilograms of ore to obtain 3120 kg of iron, assuming the ore has a 65% iron content.