1. How long does it take you to take a shower?
How much time do youspend cooking a cake?
How much time did you spend studying at the university?
2. Do you think that playing football is a waste of time?
Do you think that sleeping more tan 6 hours is a waste of time?
What do you think about playing computer games?
3. I don't agree with these ideas. It depends on the subject. Men perhaps waste more time than women in homeworks, shopping, ..or something like that, but is possible in their professional work are more rigorous.