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

[EX Q]: Problem: a rectangular block 12 cm by 36 cm by 60 cm is cut into an exact number of equal cubes . find the least possible number of cubes ? 
Options: a ) 6 , b ) 10 , c ) 15 , d ) 40 , e ) 22
[EX A]: c

[EX Q]: Problem: the length of a rectangular plot is 10 mtr more than its width . the cost of fencing the plot along its perimeter at the rate of rs . 6.5 mtr is rs . 1690 . the perimeter of the plot is ? 
Options: a ) 126 , b ) 156 , c ) 190 , d ) 321 , e ) 260
[EX A]: e

[EX Q]: Problem: the ratio of the area of a square to that of the square drawn on its diagonal is ? 
Options: ['a ) 2 : 5', 'b ) 3 : 4', 'c ) 3 : 5', 'd ) 1 : 2', 'e ) 2 : 3']
[EX A]:
d