Question

No 8, 9, 10 beserta caranya. Kalau bisa photoin aja..
tolong bantu yaa, makasih sebelumnya (:

Answer 1

8.
volume = 183,69 literr = 30 cm = 3 dm
V = πr²t
183,69 = 3,14 x 3² x t
183,69 = 28,26 x t
t = 183,69 / 28,26
t = 6,5 dm (D)

9.
L selimut = 353,25 cm
r = 7,5 cm

L permukaan = πr² + luas selimut
L = 3,14 x 7,5² + 353,25 = 176,625 + 353,25 = 529,875 cm² (A)

10.
Luas permukaan kerucut
= π(d/2)² + π(d/2) s
= πd²/4 + πsd/2
= 1/2πd (1/2d + s) (B)