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 cubical block of metal weighs 5 pounds . how much will another cube of the same metal weigh if its sides are twice as long ? 
Options: ['a ) 48', 'b ) 40', 'c ) 24', 'd ) 18', 'e ) 12']
[EX A]: b

[EX Q]: Problem: the diagonals of a rhombus are 10 cm and 15 cm . find its area ? 
Options: a ) 75 , b ) 129 , c ) 150 , d ) 123 , e ) 117
[EX A]: a

[EX Q]: Problem: the total surface area of a cuboid length 12 m , breadth 10 m and height 8 m . 
Options: ['a ) 576', 'b ) 566', 'c ) 596', 'd ) 556', 'e ) 586']
[EX A]:
c