
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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January 29th, 2017, 05:07 AM  #1 
Newbie Joined: Jan 2017 From: india Posts: 2 Thanks: 0  Surface Area Related Q
The area of two side walls of a room is 782 sq m and that of two end walls 646 sq m. Find the dimensions of the room

January 29th, 2017, 06:28 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 3,094 Thanks: 1677  
January 29th, 2017, 02:51 PM  #3 
Senior Member Joined: Jan 2014 From: The backwoods of Northern Ontario Posts: 393 Thanks: 71 
Area of each side wall is 391m² and area of each end wall is 323m². 391 = 17×23 and 323 = 17×19 (These are the only integer factors) Thus if the dimensions are limited to integer metric units, the dimension of each side wall is 27m by 17m, and the dimension of each end wall is 19m by 17m. 
January 30th, 2017, 06:03 AM  #4 
Senior Member Joined: Feb 2010 Posts: 714 Thanks: 151 
I just got back from a trip to Lilliput. The room there was 1 x 391 x 323.

February 10th, 2017, 11:51 AM  #5 
Newbie Joined: Feb 2017 From: Ontario Posts: 4 Thanks: 1 
Since the questions specifies "room" and not a "hall" I am assuming it is following standard building codes of 8' tall walls. Also the question has 3 significant digits. Therefore the dimensions are 2.44 m x 160 m x 132 m


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