Question:medium

Manu earns ₹4000 per month and wants to save an average of ₹550 per month in a year. In the first nine months, his monthly expense was ₹3500, and he foresees that, tenth month onward, his monthly expense will increase to ₹3700. In order to meet his yearly savings target, his monthly earnings, in rupees, from the tenth month onward should be

Updated On: Jan 15, 2026
  • 4200
  • 4400
  • 4300
  • 4350
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The Correct Option is B

Solution and Explanation

To calculate Manu's required monthly earnings from month ten, first determine the total annual savings target. With a monthly savings average of ₹550, the annual savings required are:

Annual Savings:

₹550/month × 12 months = ₹6,600

Next, calculate savings for the initial nine months. Manu earns ₹4,000 per month and spends ₹3,500, resulting in monthly savings of:

Monthly Savings (First 9 Months):

₹4,000 - ₹3,500 = ₹500

Total savings accumulated over the first nine months are:

Total Savings (First 9 Months):

₹500/month × 9 months = ₹4,500

The remaining savings needed to reach the annual goal are:

Remaining Savings Needed:

₹6,600 - ₹4,500 = ₹2,100

For the subsequent three months (months ten through twelve), Manu's expenses increase to ₹3,700 per month. To meet the remaining savings goal, his monthly savings during this period must be:

Required Savings per Month (Last 3 Months):

₹2,100 / 3 = ₹700

Therefore, to achieve the required savings from month ten onwards, his monthly earnings will be:

Required Monthly Earnings:

(Required Savings per Month + Monthly Expenses) = ₹700 + ₹3,700 = ₹4,400

Consequently, Manu must earn ₹4,400 per month from the tenth month onwards to meet his annual savings objective.

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