What is the volume of the doorstop below?

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3