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ATQ, Let, the monthly expenditure of Satyam = Rs.'a' So the monthly expenditure of Aman = Rs. 1.4a According to question, {(a + 9000) /(1.4a + 12000) } = (8/11) 11a + 99000 = 11.2a + 96000 0.2a = 3000 a = 15000 So the monthly salary of Satyam = 15000 + 9000 = Rs. 24,000 Monthly salary of Aman = 1.4 × 15000 + 12000 = 21000 + 12000 = Rs.33,000 Desired difference = 33000 - 24000 = Rs.9000
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