Can a brick of 9cm by 12 cm by 25 cm can pass through a pipe of diameter 14 cm?

Think of a cross-sectional view of the brick:  It's a 9 cm by 12 cm rectangle.  Calculate the diagonal of this rectangle, using the Pyth. Thm.  :

(9 cm)^2 + (12 cm)^2 = diagonal^2
 Then 81 + 144 = diagonal^2 =225.  So, the diagonal is 15 cm.  

No, the brick will not pass through a pipe with inside diameter 14 cm.