Question

of carbon in chalk If in a stick of chalk, carbon is 3g, what is the weight of the chalk stick? ​

Answer 1

Solution:

(i) Given ratio = 10 : 3 : 12

Total part = 10 + 3 + 12 = 25

Part of Carbon =25/3

Percentage of Carbon part in chalk = \frac{3}{25}\times100=12\%

ii) Quantity of Carbon in chalk stick = 3 g

Let the weight of chalk be x g.

Then, 12% of x = 3

\Rightarrow\ \frac{12}{100}\times x=3\Rightarrow x=\frac{3\times100}{12}=25\ g

Hence, the weight of chalk stick is 25 g.

$\color{blue}{ Answered \ by \ Srijan}$

Answer 2

Answer:

Solution:

(i) Given ratio = 10 : 3 : 12

Total part = 10 + 3 + 12 = 25

Part of Carbon =25/3

Percentage of Carbon part in chalk = \frac{3}{25}\times100=12\%

ii) Quantity of Carbon in chalk stick = 3 g

Let the weight of chalk be x g.

Then, 12% of x = 3

\Rightarrow\ \frac{12}{100}\times x=3\Rightarrow x=\frac{3\times100}{12}=25\ g

Hence, the weight of chalk stick is 25 g.

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Step-by-step explanation:

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