..on laundry, that hour and a half is spent washing a lot more clothes than the eleven before. If we had the limited wardrobes of those people, it'd probably be down to twenty minutes.
On the flip side, 11 hours seems high. I've washed clothes by hand before; it doesn't take that long and in fact it's faster than washing by machine (though you can't do something else at the same time).
If you're only washing your clothes maybe but 11 hours a week sounds reasonable if one person is washing clothes for a family + hanging/collecting/folding