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A started a business with tk 21000 and is joined afterwards by B with tk 36000. After how many months did B join if the profits at the end of the year are divided equally?

A started a business with tk 21000 and is joined afterwards by B with tk 36000. After how many months did B join if the profits at the end of the year are divided equally? Correct Answer 5

As their profit is equal at the end of the year, their time ratio is equal to their capital ratio oppositly. Their capital ratio is = 21000 : 36000 = 21 : 36 = 7 : 12 So, their time ratio is equal to 12 : 7 A has contributed for 12 month and B contributed for 7 months So, B has joined after 12 - 7 = 5 months

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