Tlong jawab sekarang besrta caranya tolong pliess buat bsokcdi kumpulin ???

Bab Bangun Ruang
Matematika SMP Kelas VIII

6] Tabung
t = 410 m
t = 410 x 1.000 mm
t = 410.000 mm

r = d/2
r = 4/2
r = 2 mm

volume = π x r x r x t
volume = 3,14 x 2 x 2 x 410.000
volume = 5.149.600 mm^3
volume = 5.149,6 cm^3

berat kawat = 5.149,6 x 6,2
berat kawat = 31.927,52 gram
✩✩ A ✩✩

7] kerucut
luas sisi = 1.056
π x r x (r + s) = 1.056
3,14 x 12 x (12 + s) = 1.056
12 + s = 1.056 / (3,14 x 12)
s = 28,025 - 12
s = 16,025 cm
s = 16,03 cm

✩✩ B ✩✩