Question
Monthly savings of ‘A’ is Rs. 1600 more than his
monthly expenditure and his total monthly income is Rs. 4800. 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’ = (4800 + 1600)/2 = Rs. 3200 Monthly expenditure of ‘A’ = 4800 – 3200 = Rs. 1600 Increased monthly expenditure of ‘A’ = 1.40 × 4800 – 1.375 × 3200 = Rs. 2320 Desired increase = 2320 – 1600 = Rs. 720
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