Question

intrun vas cilindric cu apa ,avand raza de 2dm, se introduce o bila .aflati volumul si aria suprafetei bilei stiind ca nivelul apei din vas creste cu0,(3) dm

Answer 1

$h=0,(3)= \frac{3}{9}= \frac{1}{3} dm \\ V _{crestere.nivel.apa} = \pi r ^{2} h= \pi *2 ^{2}* \frac{1}{3}= \frac{4 \pi }{3}dm \\ V _{bila}= \frac{4 \pi }{3}dm\\ V _{bila}= \frac{4 \pi R ^{3} }{3} \\ \frac{4 \pi R ^{3} }{3} = \frac{4 \pi }{3} \\ R=1dm$