Correct Answer: Rs. 5000
Explanation:
Income = Rs. 100
Expenditure = Rs. 80
Savings = Rs. 20
Present Expenditure 80x(15/100) = Rs. 12 = 80 + 12 = Rs. 92
Present Savings = 100 – 92 = Rs. 8
100 ------ 8 ? --------- 400 => 5000
His salary = Rs. 5000