(3,14*15{см}^2)*180{см}*0,45{г/см^3}/1000{г}…
http://www.facebook.com/photo.php?fbid=10150479540…
(3,14*15{см}^2)*180{см}*0,45{г/см^3}/100
(3,14*15{см}^2)*180{см}*0,45{г/см^3}/100
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