Subject: Mathematics
Grade Levels: 3rd Grade, 4th Grade, 5th Grade, 6th Grade,
Synopsis: There are few cities in the U.S. with the number of tall buildings that New York City has, and with a water system as old. For fire prevention, taller buildings are required to have two sources of water, and one of those is usually a tank on the roof. Updated version.
Running Time: 4:06 minutes