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A and B working together can do a piece of work in 3 days. B alone can do the same work in 21 days. How long (in days) will A alone take to do double the work?
7
10
3.5
8
7
Practice and solve "A and B working together can do a piece of work in 3 days. B alone can do the same work in 21 days. ..." for Mathematics - Previous Year Paper 2024. The correct answer is Option A: 7. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Practice and solve "A and B working together can do a piece of work in 3 days. B alone can do the same work in 21 days. ..." for Mathematics - Previous Year Paper 2024. The correct answer is Option A: 7. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.