Elie Samet asked:
why use a parsah as a measurement to gauge whether how long a person can approximate? why not half an hour or even twenty minutes that is easier to gauge half an hour than a parsah?
The Kollel replies:
Sholom Rav,
I would suggest that, before the invention of watches, it was just as practical to guage time by distances (perhaps even more so) than by time.
Indeed, from, the Mishnah in Yoma (6:8) it is clear that they were extremely adept at guaging time in this way and that this was how they in fact used do it.
Be'Virchas Kol Tuv,
Eliezer Chrysler
Elie Samet asks:
what about nowadays, why use a pariah it's so long? I meant to ask why not use a smaller measurement?