Question
The ages of A, B and C are in the ratio of 4:3:6
respectively. If the sum of their ages is 65 years, then find the age of B.Solution
Let the ages of A, B and C be 4x, 3x and 6x respectively. According to the question, => 4x + 3x + 6x = 65 => 13x = 65 => x = 5 Age of B = 3x = 3 × 5 = 15 years.
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Match List I with List II
Choose the correct answer ...
The bacteria responsible for oxidizing Fe2+ - Fe3+ (ferrous to ferric form) under acidic environment is_?
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