Question Bank › General Aptitude › Percentage › ABC26GN2288ABC26GN2288 · Percentage Subject: General Aptitude · Chapter: Percentage · Exam: · Marks: · Difficulty:
In limestone, 40\% is calcium and the rest is carbon and oxygen. If in 20 kg of limestone, there is 9.4 kg of oxygen, then what is the percentage of carbon in it?
(a) 12\%
(b) 13\%
(c) 14\%
(d) 15\%
Answer Explanation Percentage of oxygen $=\left(\frac{9.4}{20} \times 100\right) \%=47 \%$. $$\text { ∴ } \text { Percentage of carbon }=[100-(40+47)] \%=13 \% .$$
Explanation as extracted from the printed page; notation may be imperfect.
← Previous in chapter · Chapter list · Next in chapter → Open in whiteboard · Browse this chapter in the app