Question
A, B and C started a business together with Rs 12,000,
Rs 12,000 and Rs 8,000 respectively. B worked only for ‘x’ months while C left the business ‘x’ month before the completion of year. If out of annual profit of Rs 3200, ‘A’ got Rs 1800, then find the value of ‘x’.Solution
  A        :        B         :          C 12 × 12 : 12 × x : 8 × (12 – x) 36  :   3x    :   2(12 – x) According to question, => 36/(60 + x) = 1800/3200 => 60 + x = 64 => x = 4
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