Copper ore contains 8% copper. How much ore do you need to take to get 18 tons of copper?
| August 8, 2021 | education
1. Let’s make a proportion, where the mass of the original ore, from which 18 tons of copper will be obtained, will be equal to e:
18 t = 8%,
e = 100%.
2. Using the cross-rule, we calculate e:
8e = 1800,
e = 1800/8,
e = 225 t.
Answer: to get 8 tons of copper, you need to take 225 tons of copper ore.
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