Correct Answer
✅ Option a — $2x_1 + 5x_2 \le 180$
All Options:
- A$2x_1 + 5x_2 \le 180$
- B$4x_1 + 10x_2 > 180$
- C$2x_1 + 5x_2 \ge 180$
- D$4x_1 + 10x_2 \le 180$
Detailed Solution & Explanation
Let's determine the time spent in the chemical plant unit:
- One bag of Grade I requires hours, so bags require $4x_1\displaystyle hours.<br>- One bag of Grade II requires $10 hours, so bags require $10x_2\displaystyle hours.<br>- The total time spent in the chemical plant is $4x_1 + 10x_2 hours.
- The plant has a *maximum* availability of $1802\displaystyle to simplify:<br><span class="katex-display"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><semantics><mrow><mn>2</mn><msub><mi>x</mi><mn>1</mn></msub><mo>+</mo><mn>5</mn><msub><mi>x</mi><mn>2</mn></msub><mo>≤</mo><mn>90</mn></mrow><annotation encoding="application/x-tex">2x_1 + 5x_2
Hence, **Option A** is the correct answer.
About This Chapter: Linear Inequalities
Paper
Paper 3: Quantitative Aptitude
Weightage
1-3 Marks
Key Topics
Linear Inequalities in one & two variables
This chapter covers Linear Inequalities in one & two variables and is part of Paper 3: Quantitative Aptitude in the CA Foundation exam.
View Official ICAI SyllabusExam Strategy Tip
This topic carries 1-3 Marks weightage. Focus on understanding core concepts rather than memorizing.
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