A motorboat travels 200 kilometers in 5 hours going upstream. It travels 320 kilometers going downstream in the same amount of time. What is the rate of the boat in still water and what is the rate of the current?

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint