In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: rectangular floors x and y have equal area . if floor x is 10 feet by 18 feet and floor y is 9 feet wide , what is the length of floor y , in feet ?
Options: ['a ) 13 1 / 2', 'b ) 20', 'c ) 18 3 / 4', 'd ) 21', 'e ) 24']

Output: b

Input: Consider Input: Problem: a rectangular block 10 cm by 20 cm by 35 cm is cut into an exact number of equal cubes . find the least possible number of cubes ?
Options: a ) 6 , b ) 56 , c ) 15 , d ) 40 , e ) 22

Output: b

Input: Consider Input: Problem: a 9 by 12 rectangle is inscribed in circle . what is the circumference of the circle ?
Options: a ) 2.5 , b ) 5 , c ) 10 , d ) 12.5 , e ) 15
Output: e