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diagonal of rectangle ABCD

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by sanju09 » Mon Jul 26, 2010 2:47 am
What is the length of the diagonal of rectangle ABCD?

1. The perimeter of the rectangle is 16.
2. The area of the rectangle is 16.

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Source: — Data Sufficiency |
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by outreach » Mon Jul 26, 2010 3:31 am
C

1.
l+b=8


2.
lb=16
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by selango » Mon Jul 26, 2010 6:12 am
d?

d^2=l^2+b^2

stmt1,

2(l+b)=16

l+b=8

we need dont know value of l and b

stmt2,

l*b=16

combining 1 and 2

d^2=l^2+b^2=(l+B)^2-2l*b

d^2=64-32=32

Suff

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