The meter.
The appropriate unit is a metre.
Meters
12*sqrt(2) ----
The average width of a school hallway typically ranges from 4 to 8 feet (1.2 to 2.4 meters). This width allows for safe and efficient movement of students and staff, accommodating foot traffic during class changes and emergencies. Some hallways may be wider in areas with high foot traffic or near entrances. Local building codes and school design standards can also influence hallway dimensions.
Yes
The meter.
I would use meters.
21 feet
3 feet
Metres would probably be the most convenient.
The appropriate unit is a metre.
3 feet.
3 feet.
Please measure the length of this hallway.
40 feet/50 feet
Meters