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Jawaban:
9) C. 17
10) A. 3.080 cm³
Langkah :
No. 9
Voli% = 100% - 36% - 20% - 30% = 14%
Jumlah siswa karate :
= 20% x 50 siswa
= 20/100 x 50 siswa
= 20/2 siswa
= 10 siswa
Jumlah siswa Voli :
= 14% x 50 siswa
= 14/100 x 50 siswa
= 14/2 siswa
= 7 siswa
JSKDV = 10 + 7 = 17 siswa
No. 10
= (1 - 1/3) x π x r² x t
= (3/3 - 1/3) x 22/7 x (d : 2)² x 30 cm
= 2/3 x 22/7 x (14 cm : 2)² x 30 cm
= 44/7 x (7 cm)² x 10 cm
= 44/7 x 49 cm² x 10 cm
= 44 x 7 cm² x 10 cm
= 3.080 cm³