Question

Tolong y no 2.3.4.5 please

Answer 1

2. v = phi x r^2 x t
v = 22/7 . 3,5 . 3,5 . 9
v = 22 . 0,5 . 3,5 . 9
v = 346,5 cm^3
5. v = phi x r^2 x t
1100 = 22/7 . r^2 . 14
1100 = 22 . 2 . r^2
1100/44 = r^2
25 = r^2
5 = r

Answer 2

2) dik:
D = 7 , r = 7/2 = 3,5 cm
t = 9 cm
V =?

V = π r²t
V = 22/7 * 3,5² * 9
V = 346,5 cm²

3) dik:
Balok (a)
p = 10 cm
l = 7 cm
Tabung (b)
r =  7 cm
t =  10 cm

Va = Vb

Vb = π r² t
Vb = 22/7 * 7² * 10
Vb = 1540 cm²

karena Va = Vb, maka

Va = p x l x t
1540 = 10 * 7 * t
1540 = 70 * t
t = 1540 / 70
t = 22 cm

4) dik:
V = 365 cm²
r = 3,5 cm
t =?

V = π r² t
365 = 22/7 * 3,5² * t
365 = 38,5 * t
t = 365 / 38,5
t = 9,48 cm

5) dk:
V = 1100 cm²
t = 14 cm
r =?

V = π r²t
1100 = 22/7 * r² * 14
1100 = 44 * r²
r² = 1100 / 44
r² = 25
r = √25
r = 5 cm