Explanation:

- To find Roshan's share, we need to calculate the ratio of their investments by multiplying the contributed amount with the duration in months.

- Roshan's investment: Rs. 2000 for 6 months = 2000 * 6 = 12000

- Akash's investment: Rs. 1000 for 5 months = 1000 * 5 = 5000

- The ratio of Roshan's to Akash's investment is 12000:5000, which simplifies to 12:5.

- The total profit is Rs. 340.

- Roshan’s share = (12/17) * 340 = Rs. 240

Correct Answer: Option 1 - Rs. 240

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