Question 300629
volume of 10 inch block = 10*10*10 cubic inches

=1000 cu.in

volume of 2" block = 2*2* cu. in 

= 8 cu. in.

Number of 2" blocksa in 10" block = 1000 / 8= 250 blocks.

volume of 20" block = 20*20*20 = 8000 cu.in

number of 2" blocks = 8000/ 8 = 1000 blocks