Oblicz promień kuli o podanej objętości.
a) 288 pi cm^3
b) 4 1/2 pi cm^3
a)
(skracamy π)
b)
( skracamy π)
a) V=288π cm³
V=4/3 πr³
4/3 πr³=288π /:π
4/3r³=288
r³=288 · ¾=216
r=∛216=6cm
b)V=4½πcm
4/3 πr³ =9/2 π /:π
4/3r³=9/2
r³=9/2 ·¾ =27/8
r=∛27/∛8=3/2 =1.5cm
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a)
(skracamy π)
b)
( skracamy π)
a) V=288π cm³
V=4/3 πr³
4/3 πr³=288π /:π
4/3r³=288
r³=288 · ¾=216
r=∛216=6cm
b)V=4½πcm
4/3 πr³ =9/2 π /:π
4/3r³=9/2
r³=9/2 ·¾ =27/8
r=∛27/∛8=3/2 =1.5cm