Answer:
it's easier to hold a (2*8.5,11,2*5=17,11,17)compact box
each ream weighs 5p thus reducing 10p means 2 reams are removed from the twelve remaining ten.
10reams won't fit in 3 three stacks since it won't be a symmetric arrangement as 1 will be left out so 2 stacks of 5 each will be easy to carry but the stacks should be placed in such a way that the length is parallel to one another and not in line which would increase the length making it longer