slingfox wrote:

If the area of square Q is three times the area of square P, what is the ratio of the diagonal of square Q to that of square?

A. 1/Sqrt(3)

B. 1/Third Root(3)

C. Third Root(3)

D. Sqrt(3)

E. 3

Area of small square-P = s^2

Side of small square-P = s

Diagonal of a small square-P = s (sqrt2)

Area of large square-Q = 3s^2

Side of large square-Q = s {sqrt(3)}

Diagonal of a large square-Q = s (sqrt6)

Diagonal of a large square-Q / Diagonal of a small square-P = s (sqrt6) / s (sqrt2) = sqrt3

_________________

Verbal: http://gmatclub.com/forum/new-to-the-verbal-forum-please-read-this-first-77546.html

Math: http://gmatclub.com/forum/new-to-the-math-forum-please-read-this-first-77764.html

Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT