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: how many 4 x 5 x 8 cubes could fit in a 10 x 16 x 84 box ? 
Options: a ) 84 , b ) 90 , c ) 85 , d ) 77 , e ) 64
[EX A]: a

[EX Q]: Problem: the perimeter of one square is 48 cm and that of another is 20 cm . find the perimeter and the diagonal of a square which is equal in area to these two combined ? 
Options: ['a ) 5 cm', 'b ) 13 √ 2 cm', 'c ) 12 cm', 'd ) 6 cm', 'e ) 8 cm']
[EX A]: b

[EX Q]: Problem: a certain rectangular window is three times as long as it is wide . if its perimeter is 32 feet , what are its dimensions in terms of length by width ? 
Options: ['a ) 12 by 2', 'b ) 11 by 3', 'c ) 10.5 by 3.5', 'd ) 12 by 4', 'e ) 9 by 3']
[EX A]:
d