Question
The current age ratio of Amit to Bishnu stands at 5:8.
Given that the ratio of Amit's age 9 years in the future to Bishnu's age 1 year in the past is 4:5, ascertain the age of Amit 5 years ahead from the present moment.Solution
Let, the present age of 'Amit' and 'Bishnu' be '5a' years and '8a' years. ATQ, [(5a + 9) /(8a - 1) ] = (4/5) Or, 5 × (5a + 9) = 4 × (8a - 1) Or, 25a + 45 = 32a - 4 Or, 32a - 25a = 45 + 4 Or, 7a = 49 Or, a = (49/7) So, a = 7 So, the age of 'Amit' 5 years hence from now = 5a + 5 = (5 × 7) + 5 = 40 years
520 : 648 :: 128 : ?
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