Chalk contains 10% calcium, 3% carbon, 12% oxygen and the remaining sand
Find the amount of carbon and calcium (in grams) in 5/2kg of chalk. Also find
remaining
sand
the amount of sand (in kg).
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10% + 3% =7 kg
10/3=5/2
=2
100% - 23% =77
77×2
=415kg
77% is sand so,
sand is 415 kg
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