A and B are partners in a business, A contributes 3/5 of the capital for 10 months and B received 2/5 of the profits. For how long B’s money was used in the business?

A 12 months

B 11 months

C 10 months

D 9 months

E 8 months

Solution

Correct Answer: Option C

Let total capita income be ‘x’ such that A’s contribution is 3/5 of the profit = 3/5 × x = 3x/5, which results in B’s contribution as 1- 3/5 = 2/5 of the profit = 2/5 × x = 2x/5.

Months for which A contributed is 10 months and let B’s contribution is for ‘t’ months.

Ratio of A : B = ( Amount of money × Number of months)

= (3x/5 × 10) : (2x/5 × t)

= 6x : 2tx/5

= 3 : t/5

B’s profit was 2/5 such that A’s profit would be 1 – 2/5 = 3/5 such that ratio of profit of A : B = 3 : 2

Comparing the above equation

⇒ 3 : t/5 = 3 : 2

⇒ 3t/5 = 6

⇒ t = 30/3 = 10 months

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