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a) V=4/3πr³
V=36π³
Pc=4πr²
Pc=36π²
b) V=4/3*128π
V=512/3π³
Pc=128π²
c)V=288π³
Pc=144π²
d)V=32π³
Pc=48π²
2.
a)Pc=4πr²
100π=4πr²/:4π
r=√25=5 cm
b)1m²=10000cm²
10000=4πr²/:4
2500=πr² πr²=250/:π
r=√2500/π
r=√50/π cm
c)V=
288π=4/3πr³ /:π
288=4/3r³ /* 3/4
r³=216
r=6 cm
d)36l = 36dm³ = 36000cm³
36000=4/3πr³ /:π
36000/π=4/3r³ /*3/4
r³=27000/π
r=30/π cm