
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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August 14th, 2018, 10:07 AM  #1 
Member Joined: Aug 2018 From: Warrington Posts: 47 Thanks: 1  Perimeter
Another tent has the perimeter of 7.2 metres. If the width is 1.3 metres, what is the length? 
August 14th, 2018, 10:54 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 19,505 Thanks: 1740 
The semiperimeter is 3.6 m, so the length is (3.6  1.3) m, i.e. 2.3 m.

August 14th, 2018, 11:32 AM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,103 Thanks: 907  
August 14th, 2018, 11:54 AM  #4 
Member Joined: Aug 2018 From: Warrington Posts: 47 Thanks: 1 
I don't know why I am having problems with these problems but can't get my head around it

August 14th, 2018, 12:33 PM  #5 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,103 Thanks: 907  Code: A 10 B 6 6 D 10 C It's area is 6 * 10 = 60 sq. units; ok? (notice that * is now used as multiplication sign...NO longer x) It's perimeter is 6 + 10 + 6 + 10 or 2*(6 + 10) = 2*16 = 32; ok? IF you're told width = 6 and perimeter = 32, length L is calculated this way: L + L + 6 + 6 = 32 2*L = 32  6  6 2*L = 32  12 2*L = 20 L = 20/2 = 10 ; ok? Clear? Any questions? 

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perimeter, perimetre 
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