Do u really need to know only B and H to get A for T

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maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 am; Thanked: 82 times; Followed by:9 members; GMAT Score:720

Do u really need to know only B and H to get A for T

by maihuna » Tue Jan 06, 2009 12:36 pm

What is the area of triangular region T?

(1) The base of triangle T is 12.
(2) The ratio of the height of triangle T to the base of triangle T is 3:1.

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Source: Beat The GMAT — Data Sufficiency | Tue Jan 06, 2009 12:36 pm

DavoodBeater: Senior | Next Rank: 100 Posts; Posts: 57; Joined: Mon Nov 17, 2008 7:04 am; Thanked: 1 times

by DavoodBeater » Tue Jan 06, 2009 1:49 pm

1) give is only one number
2) gives us the ratio; there are a lot of triangles with this ration, consider a right triangle with height of 2 and base 6 to triangle with the height of 1 and base 3.
therefore answer is C, and the area is 18*12