Question

1. ) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage
of carbon in chalk.
(1) Ifin a stick of chalk, carbon is 3g, what is the weight of the chalk stick?​

Answer 1

(i)ratio given in a chalk=10:3:12

sum of ratios =25

%C=325×100=12%

(ii)weight of C=3g

weight of chalk=xg

Acc to question

3x=325

x=25g

answer

Answer 2

Answer:

I have many answers for this question let me tell you

Explanation:

Solution :

(i)ratio given in a chalk=10:3:12

sum of ratios =25

%C=

3

25

×100=12%

(ii)weight of C=3g

weight of chalk=xg

Acc to question

3

x

=

3

25

x=25g

second

Given ratio =10:3:12

Total part =10+3+12=25

Part of carbon =

25

3

Percentage of Carbon part in chalk =

25

3

×100=12%

(ii) Quantity of Carbon in chalk stick =3g

Let the weight of chalk be x g

then, 12% of x=3

⇒

100

12

×x=3

⇒ x=

12

3×100

=25g

Hence the weight of chalk stick is 25g