Bunuel wrote:
The shaded portion of the rectangular yard shown above represents a wooden patio. If the area of the patio is 30 square feet and b = a + 7, then c equals _____?
(A) √2
(B) 2√2
(C) 5
(D) 12
(E)13
Attachment:
2023-01-04_17-28-41.png
\(\frac{1}{2} * a * b =30\)
\( ab =60\)
\( b = a +7\)
\( a(a+7) =60\)
\( a^2 + 7a - 60 =0\)
\( a^2 + 12a -5a - 60 =0\)
\( a(a+12)-5(a+12) =0\)
\( (a-5)(a+12) =0\)
\( a =5\)
\( b = 5 + 7 =12\)
\( c =13\) (Pythogreantriplet)
OptionE
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Statistics : Posted by gmatophobia • on 27 Jan 2023, 07:30 • Replies 1 • Views 200
