Respuesta :

it would be B
Work: 

Ok lets say that prism A is = to X so we do 12x and same for prism B
we put it as 6x so lets do 12 times 6 and we get 72 then we do 2160 divided by 72 and you get thirty and thirty is your x so it is B

My source: Me Albert Einstein skillz
hey, correct me if am wrong

vol of prism = area of base * height
                  = ( Length * breadth ) * height  , so basically it is a cuboid

so, in similar figures the ratio is mainatined..

so, if breadth is 1/2 factor of  larger prism then length and height must be 1/2 

so, Vol of smaller will be = V / ( 2^3)
                                       = 4320/8  =540  cm cube