Painter P can paint a house in 16 days, and painter Q can do the same work in 20 days. With the help of painter R, they paint the house in 8 days only. Then, Painter R alone can do this task in -

• ক 70 days
• খ 60 days
• গ 80 days ✅ সঠিক উত্তর
• ঘ 50 days