Q.The ratio of the capital invested by three people is 4:7:9, and the profit of the first person is ₹100 less than the profit of the third person. What is the amount of profit earned by the second person?

Profit ratio = Capital ratio Let the profits of the three persons be ₹4x, ₹7x, and ₹9x respectively. Therefore, according to the question: \(9x - 4x = 100\) ⇒ \(5x = 100\) ⇒ \(x = 20\) So, the profit of the second person = \(7x = 7 × 20 = ₹140\)
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