Two friends P and Q started a business investing in the ratio 5 : 6. R joined them after six months investing an amount equal to that of Q's. At the end of the year, 20% profit was earned which was equal to Rs. 98000. What was the amount invested by R?

• A. Rs. 105000
• B. Rs. 175000
• C. Rs. 210000
• D. Data inadequate