How To Solve This Questionn

how to solve this questionn??

an ion exchange process is conducted in a 1.0 in diameter column 1.2 ft high. The flow rate is 1.5 gph and the breakpoint occurred at 7.0 min. Integrating the breakthrough curve gives a ratio of usablecapacity to total capacity of 0.6. Design a new tower that will be 3.0 ft high and operateat 4.5 gph. Calculate the new tower size and break-point time

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