Tolong fisika saya kakak

Massa jenis = Volume ( dalam soal ini volume silinder)

Vol. silinder = phi x jari jari^2 x tinggi
jari jari = 1/2 diameter
Diameter = 7mm = 0,7cm
Sehingga.....
Vol. silinder = phi x (1/2 diameter) ^2 x tinggi
=22/7 x (1/2 x 0,7)^2 x 1,5
=0,5775 cm kubik atau ^3

Massa jenis = massa / vol
=115,5 / 0.5775
= 200 gram / cm^3

silinder
d = 7 mm ← 1 AP
→ r = 0,35 cm
t = 1,5 cm ← 2 AP
m = 115,5 gr ← 4 AP
ρ = __? ← 1 AP

volume
V = π r² t

massa jenis
ρ = m / V
ρ = m / (π r² t)
ρ = 115,5 / (22/7 • 0,35² • 1,5)
ρ = 200 gr/cm³
ρ = 2×10² gr/cm³ ✓