A spend 25% of his monthly income on rent and 20% of remaining in food, 40%…

To find the monthly income of A based on the problem in image_4dcde4.png, let's calculate step-by-step:

Assume the total monthly income is I.

Rent Expense: A spends 25% of his income on rent.

Remaining income = I - 0.25I = 0.75I.

Food Expense: A spends 20% of the remaining income on food.

Food = 0.20 × 0.75I = 0.15I.

New remaining income = 0.75I - 0.15I = 0.60I.

Travel Expense: A spends 40% of the remaining income on traveling.

Travel = 0.40 × 0.60I = 0.24I.

Final remaining income (savings) = 0.60I - 0.24I = 0.36I.

Calculate Income:

We know the total savings is Rs. 10,800.

0.36I = 10,800.

I = 10,800 / 0.36.

I = 30,000.

The monthly income of A is 30,000, which corresponds to Option 2.