你洗澡每次花费多长时间 英语怎么说?

how long does it take you to have a bath each time?
how much does the bath cost you each time?/how much do you spend in the bath each time?
再问： 那第一句 能用 How long do you spend on 吗？ 或是 How long do you spend in doing sth ? 可以的话，比如 sepind in having a bath 吗、 您给的第二句， spend in the bath , spend on sth 才是吧。
再答： 对，我打错了，是on. 第一句可以是how much time do you spend on a bath/in haveing a bath