Question

An ore contains 5% copper. How much ore is required to obtain 400 gram of copper?

Answer 1

Let,
the amount of ore be x kg
given,
Total amount of copper
= 400kg
= 0.4 kg
A/Q
5% of x = 0.4
=>5/100 x X= 0.4
=>5x = 40
=>x =40/5
=>x = 8kg
So,
Total amount of ore = 8kg or 8000g hope it helps

Answer 2

Answer:

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