This is a simple operation problem. If we want to do it as soon as possible, we should insert small things into big events that take a long time, and pay attention to logical order at the same time. Landlord, you may still have some problems with this question, because many things can only be done independently. For example, eating and rest can't be done at the same time, rest and study can't be done at the same time, bathing, washing clothes and drying clothes can't be done at the same time, and the last few items are basically optimized in parallel. Therefore, we should consider the application of sorting principle and try to put less time in front. Wash clothes, (hang clothes, rest), take a shower, have dinner, and study in turn. It takes 40+30+20+30+60= 180 minutes, at least three hours. Actually, the meaning of your question is not clear. Different people have different opinions. Is washing clothes by hand or by machine? Take a bath by yourself or soak in the bathtub? If it is machine selection, there can be parallel steps, such as doing the most homework at the same time. If you are in the bathtub, you can take a break and take a dip. If yes, then, MAX (bath, rest)+dinner +MAX (washing clothes, studying, hanging clothes) =30+30+60= 120 minutes.