Tolong jwb no 22-27 kak
Jawaban:
24. C
25. B
26. B
27. B
Penjelasan dengan langkah-langkah:
Nomor 24.
L = s²
144 = s²
s = akar 144
s = 12
V = s³
= 12³
= 1728 cm³
Nomor 25.
La = p x l
90 = 15 × l
l = 90/15
l = 6
Lp = 2(p x l + p x t + l x t)
= 2(15 × 6 + 15 × 4 + 6 × 4)
= 2(90 + 60 + 24)
= 2(174)
= 348 cm²
Nomor 26.
Lp = 2(p x l + p x t + l x t)
376 = 2(10 x 8 + 10 x t + 8 x t)
376/2 = 80 + 10t + 8t
188 = 80 + 18t
18t = 188 – 80
t = 108/18
t = 6
V = p x l x t
= 10 x 8 x 6
= 480 cm³
Nomor 27.
T = 10
a = 12
t = 9
c² = 12² + 9²
c² = 144 + 81
c² = 225
c = akar 225
c = 15
Lp = 2 × La + Ka × T
= 2 × a × t + (a + c + t) × T
= 2 × ½ × 12 × 9 + (12 + 15 + 9) × 10
= 108 + 360
= 468 cm²