A saving amount is (S(m)=200+50m) rupees. After how many months will the amount be (500) rupees?
Answer and explanation
Correct answer: 6
To make the amount ₹500, put S(m)=500: 200+50m=500. Thus, 50m=300, so m=6. Therefore, the amount becomes ₹500 after 6 months. After 5 months, the amount is only ₹450, so it is a close but incorrect option. Exam tip: Set the given linear expression equal to the required amount and solve for m.
Frequently asked questions
What is the correct answer to this question?
6
Why is this the correct answer?
To make the amount ₹500, put S(m)=500: 200+50m=500. Thus, 50m=300, so m=6. Therefore, the amount becomes ₹500 after 6 months. After 5 months, the amount is only ₹450, so it is a close but incorrect option. Exam tip: Set the given linear expression equal to the required amount and solve for m.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
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