Question
The ages of A, B and C are in the ratio 3:5:7 and the
sum of their ages is 60. Find the ratio of 10 years ago B’s age to C’s age after 10 years.Solution
Let the present age of A, B and C be 3x, 5x and 7x respectively. According to the question, => A + B + C = 60 => 3x + 5x + 7x = 60 => x = 4 B’s age 10 years ago = 5x – 10 = 20 – 10 = 10 C’s age after 10 years = 7x + 10 = 28 + 10 = 38 Required ratio = 10 : 38 = 5:19
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