A spends 20% of his monthly salary on house rent and 25% of the remaining monthly salary on travelling. He spends his 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 Rs.700, then find the monthly salary of A (in Rs).

Correct option is B

Given:

​Difference between the amount spent on children's education and house rent is Rs.700

Formula used:

Concept of Successive percentage

Explanation:

Let monthly salary of A be Rs.100x
Expenditure on house rent =Rs. 20x
Expenditure on travelling = (100x-20x)×25/100=Rs.20x
Expenditure on food = (100x-20x-20x)×3/8=Rs.22.5x
Expenditure on children's education = (100x-20x-20x)×5/8=Rs.37.5x
ATQ,
37.5x-20x=700
x=40
Monthly salary of A = 40×100=Rs.4000

Exam Hall Method: