d1 = diameter luar
d2 = diameter dalam
t = tebal beton / cincin
r2 = ½ x d
rl = r² + t
π = 3.14
Luas beton/cincin π x (rl² - r²)
volume = panjang x luas beton/cincin
Contoh : d2= 60 cm t= 10 cm p= 100 cm
Jadi d2= 60cm= 0.6 m t= 10cm= 0.1 m
r² = ½ x d² = ½ x 0.60 = 0.30 m
rl = r² + t= 0.30+0.10 = 0.40 m
Luas penampang = π x (rl² - r²)
= 3.14 x (0.40²-0.30²)
= 3.14 x 0.017 = 0.2198 m²
= 3.14 x (0.40²-0.30²)
= 3.14 x 0.017 = 0.2198 m²
Volume = 1.00 x 0.2198 = 0.2198 m³
makasi mas brooo
BalasHapus