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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: al
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[Post New]20 Feb 2008 22:06:31 IST
    Subject: al
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md_2674062 (5)

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Congruent Rectangles
These seven congruent rectangles form a larger rectangle. If the area of the larger rectangle is 756 units2, what is its perimeter?
    
[Post New]20 Feb 2008 22:27:40 IST
    Subject: al
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sboosy (2970)

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since congruent let the sides of each of the rectangles be a and b
in the top we have 4b
in the bottom we have 3a
so 3a=4b
left we have a+b
so 3a(a+b)=756
giving a=12
which means b=9
so perimeter = 2 (3a+a+b)=114 units
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[Post New]20 Feb 2008 23:08:11 IST
    Subject: Re:al
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md_2674062 (5)

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thanks  u have a done a good job my friend lets be a fast friend
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[Post New]21 Feb 2008 14:26:41 IST
    Subject: al
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venky1907 (10)

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yes my friend .. thats true ...job very well done....
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