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Jawaban Terkonfirmasi
Bab Bangun Ruang dan Bangun Datar
Matematika SMP Kelas VIII
1] Bola Padat
r = d/2
= 42/2
= 21 cm
Volume = (4/3) x π x r x r x r
= (4/3) x 22/7 x 21 x 21 x 21
= 88 x 21 x 21
= 38.808 cm³
Berat bola besi = 38.808 x 5 gram
= 194.040 gram
= 194,04 kg
jawabannya A
2] PQ = (PD x AB + AP x CD) / (AP + PD)
= (4 x 28 + 9 x 15) / (9 + 4)
= (112 + 135)/13
= 247/13
= 19 cm
jawabannya C