Question

Tolong dijawab ya nomer 22 & 25

Answer 1

1. rusuk = 28 cm 
t tabung = 28, r = 14
v  tabung=  22/7 . r² x t 
= 22/7 x 196x 28
= 17248

2.Mean = Jumlah data / banyak data
Mean = 7+ 9+12+8+10+15+18+14+16+X dibagi 10
12 = 109 + X dibagi 10
12 × 10 = 109 + X
120 = 109 + X
120 - 109 = X
11 = X

Answer 2

Tabung dimasukkan ke kubus, jadi :
d = 28 cm
r = 1/2 x 28 = 14 cm
t = 28 cm
[text] \boxed{Vdiluar tabung = V kubus - V tabung} [/tex]
V diluar tabung
=> 28 x 28 x 28 - (14 x 14 x 22/7  28) 
=> 21952 - 17248
=> [text] \boxed{4704 cm3} [/text]

no.25