Question

225 килограмм руды получили 34 целых две десятых килограмма меди Каково процентное содержание меди в руде

Answer 1

225-100%
34,2-х%
Х=34,2*100:225
Х=15,2%

Answer 2

Calculation of Copper Content in Ore

To calculate the percentage of copper in the ore, we need to know the total weight of the ore and the weight of the copper obtained.

According to the information provided, 225 kilograms of ore yielded 34.2 kilograms of copper (34 whole kilograms and 2 tenths of a kilogram).

Calculation:

To find the percentage of copper in the ore, we can use the formula:

Percentage of Copper = (Weight of Copper / Weight of Ore) * 100

Substituting the given values:

Percentage of Copper = (34.2 kg / 225 kg) * 100

Calculating this expression gives us:

Percentage of Copper = 15.2%

Therefore, the ore contains approximately 15.2% copper.

Please note that the accuracy of this calculation depends on the accuracy of the given values.