6. What is the maximum number of rectangular blocks, each with dimensions 12 centimeters by 6 centimeters by 4 centimeters, that will fit inside rectangular box X?
(1) When box X is filled with the blocks and rests on a certain side, there are 25 blocks in the bottom layer.
(2) The inside dimensions of box X are 60 centimeters by 30 centimeters by 20 centimeters.

Answer should be B.

St1 alone - does not clarify the height of the box. So insufficient.

St2 alone - We know the inner dimensions of the box and also the dimension of each rectangular box. So this stmt is sufficient.

my stab is on ... B