SOLUTION: Hi a room is in the shape of a rectangular prism. It has 2 windows and a door that have a combined area of 5.52sqm. What is the area of the internal walls that need to be painted.

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Hi a room is in the shape of a rectangular prism. It has 2 windows and a door that have a combined area of 5.52sqm. What is the area of the internal walls that need to be painted.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1088501: Hi
a room is in the shape of a rectangular prism. It has 2 windows and a door that have a combined area of 5.52sqm. What is the area of the internal walls that need to be painted.
The prism is 4.52m long 2.41m wide and 2.96m high.
my answer is 35.5056sq m
textbook says 30.53msq
thanks
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

a room is in the shape of a rectangular prism.


given: L=4.52m+, W=2.41m and h=2.96m
It has 2 windows and a door that have a combined area of 5.52m%5E2.
so, two walls have dimensions: 2%2ALh+, the other two 2%2AWh+,
then, the area to be painted is:
2%2ALh%2B2%2AWh..........now we need to deduct given area of 2 windows and a door
2%2ALh%2B2%2AWh-+5.52m%5E2 plug in given values
2%2A4.52m%2A2.96m%2B2%2A2.41m%2A2.96m-5.52m%5E2
26.7584m%5E2%2B14.2672m%5E2-5.52m%5E2
35.5056m%5E2
your answer is same
if textbook says 30.53msq+, that must be typo