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

[Q]: Problem: the diagonal of a rectangle is 41 cm and its area is 20 sq . cm . the perimeter of the rectangle must be : 
Options: ['a ) 18 cm', 'b ) 28 cm', 'c ) 30 cm', 'd ) 38 cm', 'e ) 42 cm']
[A]: a


[Q]: Problem: the perimeter of one face of a cube is 20 cm . its volume will be : 
Options: a ) 125 cm 3 , b ) 400 cm 3 , c ) 250 cm 3 , d ) 625 cm 3 , e ) none of these
[A]: a


[Q]: Problem: the radius of a cylindrical vessel is 7 cm and height is 2 cm . find the whole surface of the cylinder ? 
Options: a ) 281 , b ) 396 , c ) 440 , d ) 767 , e ) 1981
[A]:
b