tolong dong yang nomor 14,15,16,17 plz(abaikan nomor yg ada disamping prisma)

14) K = 2 × π × r
176 = 2 × 22/7 × r
176 × 7 = 44 × r
1232 = 44 × r
r = 1232 ÷ 44
r = 28 cm
L = π × r²
= 22/7 × 28 × 28
= 2464 cm²

15) L = ¾ × π × r²
= ¾ × 22/7 × 14 × 14
= 462 cm²

16) Luas prisma
= 2 × La
= 2 × ½ × a × t
= 2 × ½ × 24 × 18
= 432 cm²
Luas selimut
= kell × t
= ( 24 + 18 + 30 ) × 38
= 72 × 38
= 2736 cm²
Luas total
= 432 + 2.736
= 3.168 cm²

17) V = ½ × a × ta × tp
= ½ × 16 × 12 × 25
= 2.400 cm³