Question

find % of all three calcium, carbon and oxygen if calcium, carbon and oxygen are in ratio 10:3:12 ​

Answer 1

Step-by-step explanation:

Given ratio = 10 : 3 : 12

Total part = 10 + 3 + 12 = 25

Part of Carbon =

\frac{3}{25}

25

3

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

25

3

×100=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⇒

100

12

×x=3⇒x=

12

3×100

=25 g

Hence the weight of chalk stick is 25 g.

Answer 2

Answer:

Given ratio=10 : 3 : 12

Total part=10 + 3 + 12 =25

i)Part of Carbon=3/25

Percentage of Carbon part

=3/25×100=12%

ii)Part of Calcium=10/25

Percentage of Calcium part =10/25×100=40%

iii)Part of Oxygen=12/25

Percentage of Oxygen part =12/25×100=48%

Please mark as the brainliest answer.