Syubbana
No 16) luas permukaan bola = 4 x phi x r^2 = 4 x 3,14 x 30^2 = 11304 cm^2
jawaban A
no 17) volum air = volum tabung - volum bola = (phi x r^2 x t) - (4/3 x phi x r^3) = ( 3,14 x 30 x 30 x 60) - (4/3 x 3,14 x 30 x 30 x 30) = 169.560 - 113.040 = 56.520
= 4 x 3,14 x 30^2
= 11304 cm^2
jawaban A
no 17) volum air = volum tabung - volum bola
= (phi x r^2 x t) - (4/3 x phi x r^3)
= ( 3,14 x 30 x 30 x 60) - (4/3 x 3,14 x 30 x 30 x 30)
= 169.560 - 113.040
= 56.520
jawaban C