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phoenix9801: Master | Next Rank: 500 Posts; Posts: 190; Joined: Thu Jan 14, 2010 8:29 pm; Thanked: 2 times

by phoenix9801 » Sun Jun 10, 2012 3:23 pm

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Source: Beat The GMAT — Problem Solving | Sun Jun 10, 2012 3:23 pm

gmat_and_me: Senior | Next Rank: 100 Posts; Posts: 58; Joined: Sat Mar 05, 2011 9:14 amFollowed by: 5 members; Location: Bangalore; Thanked: 20 times; GMAT Score:770

by gmat_and_me » Mon Jun 11, 2012 5:44 am

Perimeter is sum of lengths of all sides = 2 * (b + 3 + a + b) < 30
=> a + 2b + 3 < 15 => a + 2b < 12. Solve the equation for a and b.
Should be a, b, d, and f unless I made some silly mistake

HTH

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