Question
Monthly savings of ‘A’ is Rs. 900 more than his
monthly expenditure and his total monthly income is Rs. 7500. If his monthly income is increased by 40% and his monthly savings is increased by 37.5%, then find the increase in his monthly expenditureSolution
Monthly savings of ‘A’ = (7500 + 900)/2 = Rs. 4200 Monthly expenditure of ‘A’ = 7500 – 4200 = Rs. 3300 Increased monthly expenditure of ‘A’ = 1.40 × 7500 – 1.375 × 4200 = Rs. 4725 Desired increase = 4725 – 3300 = Rs. 1425
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