instruction:
In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
question:
Problem: a rectangular block 10 cm by 20 cm by 30 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
answer:
a


question:
Problem: the slant height of a cone is 21 cm and radius of the base is 10 cm , find the curved surface of the cone . 
Options: a ) 330 , b ) 770 , c ) 660 , d ) 100 , e ) 600
answer:
c


question:
Problem: the diameter of a cylindrical tin is 8 cm and height is 5 cm . find the volume of the cylinder ? 
Options: a ) 33 , b ) 45 , c ) 66 , d ) 80 , e ) 21
answer:

d