The ratio between two numbers is 7:8. If each number is increased by 9, the ratio between then become 10:11, find the difference between numbers.
Let first number be 7x and the second number is 8x. According to the question, => (7x + 9)/(8x + 9) = 10/11 => 77x + 99 = 80x + 90 => x = 3 Required difference = 8x – 7x = x = 3
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