Task: Question Answering
Input (English): Problem: a flagpole 18 meters high casts a shadow of length 45 meters . if a building under similar conditions casts a shadow of length 65 meters , what is the height of the building ( in meters ) ? 
Options: a ) 22 , b ) 24 , c ) 26 , d ) 28 , e ) 30
Output (English): c