Question
The ratio of the present ages of Ginni and Binni is 7:3
respectively. Ginni is ‘n’ years older than Binni. If after 5 years, the ratio of the ages of Binni to Ginni is 1:2, then find the value of √ (n+5).Solution
Let the present ages of Ginni and Binni be 7x and 3x respectively. Here, n = 7x – 3x = 4x According to the question, => (7x + 5)/(3x + 5) = 2/1 => x = 5 Now, n = 4x = 20 Required value = √(n+5) = √(20+5) = √25 = 5
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