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M invests Rs.4000 in coaching classes. After 3 months N comes along with Rs.8000. P comes in with Rs.20000.The classes earn a profit of Rs.112000 at the end of the year.If profits of M, N and Pare in ratio of 6:9:5, for how many months was P involved?5 months6 months2 months3 months

Question

M invests Rs.4000 in coaching classes. After 3 months N comes along with Rs.8000. P comes in with Rs.20000.The classes earn a profit of Rs.112000 at the end of the year.If profits of M, N and Pare in ratio of 6:9:5, for how many months was P involved?5 months6 months2 months3 months

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Solution

To solve this problem, we need to understand that the profit share of each person is directly proportional to the product of the money they invested and the time for which they invested.

Given that M, N, and P share the profit in the ratio 6:9:5.

Let's assume that P was involved for 'x' months.

M was involved for 12 months, N was involved for 12 - 3 = 9 months, and P was involved for 'x' months.

So, the ratio of their investments multiplied by the time they were involved is:

M's share = 4000 * 12 : N's share = 8000 * 9 : P's share = 20000 * x

This should be equal to the ratio of their profit shares, which is 6:9:5.

So, we have:

(4000 * 12) / 6 = (8000 * 9) / 9 = (20000 * x) / 5

Solving the equation (20000 * x) / 5 = (4000 * 12) / 6 gives:

x = (4000 * 12 * 5) / (20000 * 6)

x = 5

So, P was involved for 5 months.

This problem has been solved

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