If Chalk contains Calcium, Carbon, and Oxygen in the ratio $10 : 3 : 12$ .If in a stick of chalk, carbon is $3 g$ , what is the weight of the chalk stick?

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Solution

Given: Weight Ratio, Calcium:Carbon: Oxygen $= 10 : 3 : 12$
So, Weight of calcium in chalk stick $= 10 x$
Weight of Carbon in chalk stick $= 3 x$
and, Weight of oxygen in chalk stick $= 12 x$
It is given that the weight of carbon in this chalk is $3 g$
$∴ 3 x = 3$
$\Rightarrow x = 1$
Weight of the chalk stick $= 10 x + 3 x + 12 x$
$= (10 \times 1) + (3 \times 1) + (12 \times 1)$
$= 10 + 3 + 12 = 25 g$
Hence, the weight of the chalk stick will be $25 g$ when the carbon is $3 g$ .

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If Chalk contains Calcium, Carbon, and Oxygen in the ratio 10:3:12.If in a stick of chalk, carbon is 3 g, what is the weight of the chalk stick?

If Chalk contains Calcium, Carbon, and Oxygen in the ratio $10 : 3 : 12$ .If in a stick of chalk, carbon is $3 g$ , what is the weight of the chalk stick?