Question

Berat 1000 kelereng berdiameter 21mm \pi = 22 per 7 jika berat 1 cm berat 6 gram adalah ??

Answer 1

Ubah 21mm= 2,1 cm
mencari dahulu volume bola = 4/3πr^3
v = 4/3 x 22/7 x (2,1)^3
v = 38,808
berat 1 kelereng = 38.808 x 6 = 232,848
berat 1000 kelereng = 232,848 x 1000 = 232848 gram

Answer 2

D=21 mm= 2,1 cm
berat jenis=6gr

Berat 1000 kelereng
=1000 Vkelereng × berat jenis
=1000 × 1/6πd³ × 6 gr
=1000×22/7×2,1×2,1×2,1
=29.106 gram
=29,106 Kg