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1.256 = 4 × 3,14 × r²
r² =
r² = 100
r = 10 cm
2.) V = πr²t
3.080 = × 14² × t
t =
t = 5 cm
3.) t =
=
=
=
= 12 cm
V = ¹/₃ π r² t
= ¹/₃ × 3,14 × 5² × 12
= 100 × 3,14
= 314 cm³
4.) Lp = 4πr²
2.826 = 4 × 3,14 × r²
r² =
r² =
r =
r =
r = 15 cm
Maaf yang no. 5 nya masih belum bisa. nanti kalau sudah ketemu pasti saya kasih tahu.