Task: Question Answering
Input (English): Problem: a hollow spherical metallic ball has an external diameter 6 cm and is 1 / 2 cm thick . the volume of metal used in the metal is : 
Options: ['a ) 47 1 / 5 cm 3', 'b ) 47 3 / 5 cm 3', 'c ) 47 7 / 5 cm 3', 'd ) 47 9 / 5 cm 3', 'e ) none of these']
Output (English): b