Tolong dijawab segera.akan dikumpulkan. lengkap cara mengerjakannya. no.3,4,5
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3) tinggi kerucut = akar((25)2 - (15)2) = akar(625 - 225) = akar400 = 20 cm V = 1/3 × 3,14 x 15 cm x 15 cm x 20 cm = 4.710.000 cm3 4) 22/7 x r2 x 36 = 88.704 88704/36 x 7/22 = r2 784 = r2 r = 28 cm
5) V bola : V tabung = 4/3 x 22/7 x 7 cm x 7 cm x 7 cm : 22/7 x 7/2 cm x 7/2 cm x 7 cm = 4/3 : 1/4
V = 1/3 × 3,14 x 15 cm x 15 cm x 20 cm = 4.710.000 cm3
4) 22/7 x r2 x 36 = 88.704
88704/36 x 7/22 = r2
784 = r2
r = 28 cm
5) V bola : V tabung
= 4/3 x 22/7 x 7 cm x 7 cm x 7 cm : 22/7 x 7/2 cm x 7/2 cm x 7 cm
= 4/3 : 1/4