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a. jari" alas tabung
volume tabung = phi × r² × t
⇒15.400 = 22/7 × r² × 25
⇒15.400 ÷ 22/7 ÷ 25 = r²
⇒196 = r²
⇒r² = 196
⇒r = √196
⇒r = 14
b luas selimut
luas selimut = diameter × tinggi tabung
⇒L.selimut = 2 × 14 × 25
⇒L.selimut = 700
maaf jika ada salah" kata, dan jika ada yang kurang di mengerti silahkan tanyakan kembali, sesungguh nya benar itu hanya milik Allah
Wassalamu'alaikum
v = π x r² x t
15400 = 22/7 x r² x 25
15400 = 550/7 x r²
15400 x 7/550 = r²
196 = r²
√196 = r
14 = r
b. luas selimut
L = 2 x π x r x t
= 2 x 22/7 x 14 x 25
= 2.200
c. luas sisi tabung
L = 2 π r ( r + t )
= 2 x 22/7 x 14 ( 14 + 25 )
=88 (39)
= 3.432
kalo ga salah