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

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
b

Problem: what positive number , when squared , is equal to the cube of the positive square root of 17 ? 
Options: ['a ) 64', 'b ) 32', 'c ) 8', 'd ) 4', 'e ) 2']
c

Problem: a cube is divided into 729 identical cubelets . each cut is made parallel to some surface of the cube . but before doing that the cube is coloured with green colour on one set of adjacent faces , red on the other set of adjacent faces , blue on the third set . so , how many cubelets are there which are painted with exactly one colour ? 
Options: a ) 293 , b ) 294 , c ) 295 , d ) 296 , e ) 298

b