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One pipe can fill the tank in 21 min while another pipe can empty the completely filled tank in 70 min. If both the pipes are operated together on the empty tank, how long (in min) will it take to fill two-thirds of the tank?
80
20
40
60
20
Practice and solve "One pipe can fill the tank in 21 min while another pipe can empty the completely filled tank in 70 m..." for Quantitative Aptitude - CCIJunior Commercial Executive 01 Sep 2026 Shift 3. The correct answer is Option B: 20. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Practice and solve "One pipe can fill the tank in 21 min while another pipe can empty the completely filled tank in 70 m..." for Quantitative Aptitude - CCIJunior Commercial Executive 01 Sep 2026 Shift 3. The correct answer is Option B: 20. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.