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: the ratio of the volumes of two cubes is 1000 : 1331 . what is the ratio of their total surface areas ? 
Options: a ) 100 : 121 , b ) 100 : 127 , c ) 81 : 191 , d ) 81 : 161 , e ) 100 : 182
[EX A]: a

[EX Q]: Problem: the radius of a cylinder is 2 r units and height is 3 r units . find the curved surface ? 
Options: a ) 18 π r 2 , b ) 12 π r 2 , c ) 3 π r 2 , d ) 6 π r 2 , e ) 9 π r 2
[EX A]: b

[EX Q]: Problem: the perimeter of a rhombus is 120 feet and one of its diagonal has a length of 40 feet . find the area of the rhombus . 
Options: ['a ) 100 sqrt ( 5 ) ft . sq', 'b ) 400 sqrt ( 5 ) ft . sq', 'c ) 500 sqrt ( 5 ) ft . sq', 'd ) 200 sqrt ( 5 ) ft . sq', 'e ) 150 sqrt ( 5 ) ft . sq']
[EX A]:
b