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A spends 20% of his monthly salary on house rent and 25% of the remaining monthly salary on travelling. He spends the remaining monthly salary on food and children's education in the ratio of 3:5 respectively. If the difference between the amount spent on children's education and house rent is ₹700, then find the monthly salary of A.

1. 2500
2. 4000
3. 4500
4. 5000

Correct answer: 4000

Solution

Let monthly salary be x. Rent = 20% of x = x/5. Remaining = 4x/5, and travel = 25% of remaining = x/5, so balance = 3x/5. Children's education = 5/8 of 3x/5 = 3x/8. Given difference between education and rent is 700: 3x/8 - x/5 = 700. Solving gives x = 4000.

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