Let the monthly salary of A be Rs. ‘x’ Amount spent on food = Rs. 0.20x Amount spent on rent = Rs. 0.30x Amount received by brother = (x – 0.30x – 0.20x) × 0.20 = 0.10x So according to question: => 0.30x – 0.10x = 2880 => 0.20x = 2880 => x = 14400 So, the amount spent on food = 0.20 × 14400 = Rs. 2880
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