# SOLUTION: can someone please help me with this problem? The volume of a cube is given by V = s3. Find the length of a side of a cube if the Volume is 729 cm3.

Algebra ->  Algebra  -> Square-cubic-other-roots -> SOLUTION: can someone please help me with this problem? The volume of a cube is given by V = s3. Find the length of a side of a cube if the Volume is 729 cm3.      Log On

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 Question 24890: can someone please help me with this problem? The volume of a cube is given by V = s3. Find the length of a side of a cube if the Volume is 729 cm3.Found 2 solutions by music974, rapaljer:Answer by music974(43)   (Show Source): You can put this solution on YOUR website!Subsitute v with 729. Then you get 729=s3. Then divide each side by three to get 243=s. one of your sides therefore is 243cm3. Answer by rapaljer(4667)   (Show Source): You can put this solution on YOUR website!Oops!! I think the previous solution is in error! The formula for Volume is , so . To solve this, you'll need to take the cube root of each side. A calculator would be helpful, since this number 729 is fairly large. If you don't have a calculator, then what you will need to do is find a number that you can cube (that is, multiply times itself and times itself again!) and get 729. You probably know that , and . Since 729 is between 125 and 1000, the number you need must be between 5 and 10. Try 9! , so the answer is s= 9 cm. R^2 at SCC