Posted by Jack on Sunday, November 21, 2010 at 8:29pm.
See http://www.jiskha.com/display.cgi?id=1290346564 for explanation of Archimedes principle of floatation.
Basically an object floating in a fluid displaces a volume of fluid equal to its own weight.
So this 1 m³ object has 80% of it submerged. How much weighs the water it displaced? And its own weight equals?
ll
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