tolong bantuin nomor 2 dan 3

2]…
a) Luas Tabung = 2πr (r + t)
= 2 x 22/7 x 7 (7 + 12)
= 44 x 19
= 836 cm2
b) Volume = πr2t
= 22/7 x 7 x 7 x 12
= 1848 cm3

3]…
a) Luas Tabung = 2πr (r + t)
La = πr2
154 = 22/7 x r2
154 x 7 = 22r2
1078 = 22r2
r2 = 1078 : 22
r2 = 49
r. = √49 = 7 cm
Ltabung = 2πr (r + t)
= 2 x 22/7 x 7 (7 + 14)
= 44 x 21
= 924 cm2

b). πr2t = La x t
= 154 x 14
= 2156 cm2

klo bisa jadiin sbg yg terbaik yaa lgi perlu soalnya