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2014-03-20T09:53:02+02:00
At=Al+Ab
270 \sqrt{3} =195 \sqrt{3} +Ab
Ab=270 \sqrt{3} -195 \sqrt{3}
Ab=75 \sqrt{3
}
Ab= \frac{ l^{2} \sqrt{3} }{4}=75 \sqrt{3}
In final l^{2} =10 \sqrt{3}
OM= \frac{1}{3}*  \frac{10 \sqrt{3}* \sqrt{3}  }{2} =5
Al=\frac{Pb*ap }{2}   Pb=195 \sqrt{3} ;  VO=13VO^{2}= 13^{2} - 5^{2} 
;VO=12V= \frac{Ab*h}{3}= \frac{75 \sqrt{3}*12 }{3} .Se simplifica iar in final V=300 \sqrt{3}  cm^{3}