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UN CON CIRCULAR DREPT ARE V=320PI CM² SI ARIA BAZEI=64PI CM². CALCULATI
A)H
B) R
C) G

Răspuns :

Miky93ask
V=πR² * h/3=  320π
Ab=64π
Ab=πR²

64π * h/ 3=320π
h=3* 320π/ 64π
h=3*5
h=15cm

64π=πR²
64=R²  ⇒R=8

ΔVOB,mas<O=90   ⇒VB²= VO²+OB²=15²+8²=225 +64=289   ⇒VB=17  g=17
VO-h
OB-R
a)V= Ab •h/3 => h= 3V/ Ab H= 15 b)Ab=πR² Ab= 64π=> 64= R²=> R = 8

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