Tanzi and Maeve each have brand new 1200 mL bottles of soap. They use soap at different constant rates. When Tanzi's bottle is completely empty, she asks Maeve to add soap from Maeve's bottle, which is still two-thirds full. How many milliliters of soap should Maeve pour from her bottle into Tanzi's so that both bottles will be completely emptied at the same time?
Tanzi uses 1200 ml when Maeve uses (1/3) 1200 ml = 400 ml
Therefore.....she uses 3 times as much in a specified amout of time
Maeve should pour (3/4) (400 ml) = 300 ml into Tanzi's bottle
Tanzi will have 300 ml and Maeve will have 100 ml and.....3 times what Maeve uses = whatTanzi uses in the same amount of time