tolong no 6, 7, dan 8

8. Diketahui : r = 16 cm, t = 56 cm
Ditanya : V = ?
Jawab :
V = Luas Alas x tinggi
= 2 Phi r^2 × t
= 2 × 22/7 × (16)^2 × 56
= 90112 cm^3
Tanda ^ artinya pangkat

3. Diketahui : d =28 cm
Ditanya : L = .?
Jawab :
L = Phi × 1/4(d)^2
= 22/7 × 1/4 (28)^2
= 17248 / 28
= 616 cm^2

4. Diketahui : r = 10 cm
Ditanya : L =.?
Jawab :
L = phi x r^2
= 22/7 × (10)^2
= 22/7 × (100)
= 2200 / 7
= 314,3 cm^2