3-22

This topic has expert replies
Source: — Data Sufficiency |

Master | Next Rank: 500 Posts
Posts: 214
Joined: Fri Jul 20, 2007 1:35 am
Thanked: 3 times

by beny » Sat Aug 25, 2007 2:17 pm
With each statement, you should be able to solve for side-length of the cube, which allows you to solve for area. Answer should be D.

Master | Next Rank: 500 Posts
Posts: 484
Joined: Sun Jul 30, 2006 7:01 pm
Thanked: 2 times
Followed by:1 members

by magical cook » Sun Aug 26, 2007 4:15 pm
Thanks - the OA is D.

Just curious... Can anyone show me how to get answer from 2)?

Master | Next Rank: 500 Posts
Posts: 214
Joined: Fri Jul 20, 2007 1:35 am
Thanked: 3 times

by beny » Sun Aug 26, 2007 6:39 pm
Label the side x. The diagonal of the base would be x*sqrt(2) (45-45-90). Pyth. Theorm: x^2 + x*sqrt(2)^2 = 10*sqrt(3)^2.

Solve for x, and you can find volume.

Master | Next Rank: 500 Posts
Posts: 484
Joined: Sun Jul 30, 2006 7:01 pm
Thanked: 2 times
Followed by:1 members

by magical cook » Sun Aug 26, 2007 6:56 pm
Thank you beny. :)