dynaf
No.1a v kerucut = 1/3 x phi x r kuadrat x t 1/3 x 22/7 x 21 x 21 x 10 = 4620 No.1b = 1/3 x 3,14 x 10 x 12 = 125,6 2a. Jika mencari t maka = akar dari s - r = 625 - 49 = akar dari 576 = 24 2b. 1/3 x 22/7 x 7 x 7 x 24 = 1232 3. V krcut = 1/3 x phi x r kuadrat x t 770 = 1/3 x 22/7 x rkuadrat x 15 770 = 110 per 7 x r kuadat 770 x 7 = 110 x rkuadrat 5390 = 110 x r kuadrat r kuadrat = 5390 : 110 = 49 r = akar dari 49 = 7 Nomor 4 saya kurang tau
a. t^2 = s^2 - r^2
t^2 = 25^2 - 7^2
t^2 = 576
t = 24
b. V=1/3 phi r^2
V = 1/3.22/7.49
V = 1.232
Nomor 3:
V = 1/3.phi.r^2.t
770 = 1/3.22/7.15.r^2
r^2 = 5.350/110
r^2 = 49
r = 7
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