Question

# Chalk contains calcium , carbon and oxygen in the ratio $$10 :3 :12$$. Find the percentage of carbon in chalk.

Solution

## We have, $$Calcium:Carbon:Oxygen=10:3:12$$ Then, Total parts is $$=10+3+12=25$$ Now $$Carbon\%=\dfrac{Carbon}{total}\times 100$$ $$=\dfrac{3}{25}\times 100$$ $$=3\times 4$$ $$=12\%$$ Hence, this is the answer.Mathematics

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