Question
A spent 36% and 30% of his monthly salary on food and
rent, respectively. Of the remaining amount, he gave 20% and 40% to his mother and brother, respectively. Find the amount spent by him on food, if the difference between the amount received by his brother and the amount spent on rent is Rs. 8200.Solution
Let the monthly salary of A be Rs. ‘x’ Amount spent on food = Rs. 0.36x Amount spent on rent = Rs. 0.30x Amount received by brother = (x - 0.36x - 0.30x) x 0.40 = 0.136x So according to question: 0.30x - 0.136x = 8200 0.164x = 8200 x = 50000 So, the amount spent on food = 0.36 x 50000 = Rs. 18000
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Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence?
