Question 1109920
There are six faces, two of which are a x a so that is 2a^2
The other four are 2a x a, or a total of 8a^2
The total surface area is 10a^2
The volume is a x a x 2a=2a^3
10a^2=1000
a^2=100
a=10 ANSWER 
volume is 2a^3=2000 cm^3.