A started a business with an investment of Rs.35000. After few months B joined him with an investment of Rs.42000. If at the end of the year, they share the profit in the ratio of (A:B) 7:10, then find after how much time B joined the business?
Let B invested for ‘m’ months. According to the question, => (35000 x 12)/(42000 x m) = 10/7 => m = 7 months So, the required time = 12 – 7 = 5 months
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