How to calculate this maths problem?
2015-09-11 10:56 am
A copper mine contains 3/50 pure copper. If 15 kg of copper ore is needed, how much copper ore does it require?
回答 (4)
2015-09-11 11:20 am
✔ 最佳答案
15 kg. Read what you post! Let's assume that you mean 15 kg of pure copper are needed. Simple unit conversion.(15 kg Cu)(50 kg ore/3 kg Cu) = 250 kg ore
2015-09-11 11:06 am
3x/50 = 15
x = 250 kg
x = 250 kg
2015-09-11 5:26 pm
The ore needed=15kg/(3/50)=250 kg.
2015-09-11 11:24 am
15 kg pure copper x( 50 kg copper ore/ 3 kg pure copper) = 250 kg copper ore
收錄日期: 2021-04-18 00:15:13
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