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Let the monthly salary of Rajesh be Rs. ‘x’ Amount spent on food = Rs. 0.30x Amount spent on rent = Rs. 0.25x Amount received by brother = (x - 0.30x - 0.25x) x 0.40 = 0.18x So according to question: 0.25x - 0.18x = 2240 0.07x = 2240 x = 32000 So, the amount spent on food = 0.30 x 32000 = Rs. 9600