REctangular solid

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hrishikesh05: Junior | Next Rank: 30 Posts; Posts: 28; Joined: Sat Jul 05, 2008 11:07 pm; Thanked: 2 times

by hrishikesh05 » Sat Dec 13, 2008 11:43 pm

In the rectangular solid the three sides have areas 12, 15, and 20,
respectively. What is the volume of the solid?
A. 60
B. 120
C. 450
D. 1,800
E. 3,600

OA B

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Source: Beat The GMAT — Problem Solving | Sat Dec 13, 2008 11:43 pm

krazzy4: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Sat Apr 26, 2008 7:42 am

Re: REctangular solid

by krazzy4 » Sun Dec 14, 2008 1:15 am

hrishikesh05 wrote:In the rectangular solid the three sides have areas 12, 15, and 20,
respectively. What is the volume of the solid?
A. 60
B. 120
C. 450
D. 1,800
E. 3,600

OA B

let the sides of the rectangular solid are a,b and c.
given,ab=12,bc=15 and ca=20

ab*bc*ca=12*15*20
(abc)^2=3600
abc=60, the volume of the solid.

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adilka: Senior | Next Rank: 100 Posts; Posts: 79; Joined: Thu Oct 23, 2008 9:28 am; Location: Canada; Thanked: 1 times; GMAT Score:700

by adilka » Sun Dec 14, 2008 11:13 am

That's right, Krazzy.... I get the same answer. It's a pretty simple problem so i don't see 2 ways about it.
I think the OA of B is a typo. Pls confirm

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