Eruv techumin shifts your halachic base to the food location. From there, you get 2000 cubits in every direction — but you lose distance in the direction behind you.
Question 2
You place eruv techumin food east of your city. What happens to your walking range westward?
The eruv is a trade-off: gaining distance in one direction means losing it in the opposite direction. Your total range doesn't increase — your center shifts.
Question 3
When must the eruv techumin be placed?
The eruv must be in place before Shabbat. Once Shabbat begins, your halachic base is established and cannot be changed.
Question 4
How much food is needed for an eruv techumin?
Two meals' worth of food — representing the sustenance you'd need at your new "base" for Shabbat.
Question 5
Why would someone use an eruv techumin?
The classic use: you need to reach a place (synagogue, wedding, brit milah) that's beyond your normal Shabbat walking range. The eruv shifts your base to make it reachable.