The ratio between two numbers is 6:7. If each number is increased by 9, the ratio between then become 9:10, find the difference between numbers.
Let first number be 6x and the second number is 7x. According to the question, => (6x + 9)/(7x + 9) = 9/10 => 60x + 90 = 63x + 81 => x = 3 Required difference = 7x – 6x = x = 3
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