Acartoon can hold 1,000 unit cubes that measure 1 inch by 1 inch by 1 inch. describe the dimensions of the cartoon using unit cubes

The volume of each cube =1 × 1 × 1 = 1 cubic inches.The volume of the carton = 1000 cubic inches.
Dimensions of the carton are 10 inches by 10 inches by 10 inches. 

I hope this helps! ;) 
By the way, you made a mistake by choosing this subject "Geography". It should have been "Maths"... /  Next time make sure you choose the right subject! ;)

Each dimensions would be 10 by 10 by 10 due to the volume being 1,000 and each cube being 1 by 1 by 1

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Answer collision and mountain formation;