SOLUTION: A room is 15 feet by 12 feet by 9 feet high , it contains an air conditioner that circulates air at rate of (11) cubic meters per hour . how long does it takes to exchange the a

Algebra ->  Customizable Word Problem Solvers  -> Unit conversion -> SOLUTION: A room is 15 feet by 12 feet by 9 feet high , it contains an air conditioner that circulates air at rate of (11) cubic meters per hour . how long does it takes to exchange the a      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 717777: A room is 15 feet by 12 feet by 9 feet high , it contains an air conditioner that circulates air at rate of (11) cubic meters per hour .
how long does it takes to exchange the air in the room 10 times ,giving your answer to the nearest minute?
thank you i need urgent help please?



Found 2 solutions by Alan3354, fireychariot:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A room is 15 feet by 12 feet by 9 feet high , it contains an air conditioner that circulates air at rate of (11) cubic meters per hour .
how long does it takes to exchange the air in the room 10 times ,giving your answer to the nearest minute?
=============
The room's volume = 15*12*9 = 1260 cubic feet.
10 times that = 12600 cu ft
------
1 cu meter =~ 35.315 cu ft
11 cm meters/hr = 388.46 cu ft/hr = 6.4744 cu ft/min
-----
12600/6.4744 = 1946 minutes


Answer by fireychariot(1) About Me  (Show Source):
You can put this solution on YOUR website!
Alan's method is right however just to point out 15*12*9 is not 1260 but 1620.