Baby010391
03.12.2021 •
Mathematics
When a rock sample from a rock bed was examined, it was found that 5.7 kilograms of the total mass of the sample was copper If this sample contains 25% of the total copper in the rock bed, how many kilograms of copper were in the rock bed?
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Ответ:
10 kilos
Step-by-step explanation:
5.7 is mass of copper by 49%
Ответ:
"b" option is correct , its not proportion
Step-by-step explanation:
Because for proportion it L.H.S=R.H.S
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