Lol. Okay so of course it depends where your garbage cans are. For me it's about a 2 minute walk. And for each bag of garbage is about 3-5 pounds (it depends what is in it). When you do the math it's not going to be an accurate answer.
let's say it weighs approx. 4 pounds for each bag.
Total is 100 pounds to take out and its a 2 minute walk.
4(2) = 6 100(2)= 200
200 divided by 6 = 33.333...
So its about 30 minutes to take out 100 pounds of garbage.
Hope this helps. :)