Forum - Geometry

In a room as a cuboid with fresh air

maritza
Visitor
2016-08-13 06:12:02
#1
In a room shaped like a cuboid with a length of 14m, width 7m and 3.5m height are 40 students and teacher. It is known that the air in a room becomes dangerous when breathing in every cubic meter of air contains carbon dioxide 4dm3. It is known that each person 16h expire in a minute cite 0.5 dm3 air containing 5% carbon dioxide. In these conditions, determine the maximum tolerable as room is not ventilated.

 

RE: In a room as a cuboid with fresh air

TeacherM
Visitor
2016-08-13 06:25:19
#2
Air volume of the cuboid: 14 * 7 * 1.4 = 343 m3.

As the air becomes dangerous => 343 * 4 = 1372 dm3 CO2.

A man produces 16 breaths per minute: 16 * 0.5 = 8 dm3 of which 5% is CO2 => 0.4 dm3 CO2.

In total there are 40 + 1 = 41 persons => 41 * 0.4 = 16.4 dm3 (the maximum administrative).

Dividing 1372 to 16.4 => 83 658 min => 83.65 min (after 83 minutes).
 
 

Search


Forum

Here you can discuss about mathematic, about algebra, geometry, trigonometry.

It is not mandatory to be logged in on this forum but it is nice to have an account. You can ask about mathematics just with your name and your email.

This maths forum is one of the easiest forums to use it.

>> Go to Math Forum

Forum Maths