No 24 = 14 cm

24.
r = 7 cm

L = TT x r x r
L = 22/7 x 7 x 7
L = 154 cm2 (A)

25.
L = 1/2 x TT x r x r
L = 1/2 x 22/7 x 14 x 14
L = 308 cm2 (B)

26.
K1 = 3/4 x 2 x TT x r
K1 = 3/4 x 2 x 22/7 x 14
K1 = 66 cm

K = 66 + 14 + 14 = 94 cm (D)

27.
p = 35 m
l = 20 m

K = 2 x (p+l)
K = 2 x (35 + 20)
K = 2 x 55
K = 110 cm

Banyaknya pohon = 110 : 5 = 22 pohon (A)

28. D. Balok

29.
p = 175 cm
l = 15 cm
t = 10 cm

Lp = (2 x p x t) + (2 x p x l) + (2 x l x t)
Lp = (2 x 175 x 10) + (2 x 175 x 15) + (2 x 15 x 10)
Lp = 3500 + 5250 + 300
Lp = 9050 cm2 (A)

30. B

NB : Semoga benar semua ya. Diperiksa lagi ya ^^ Good luck
Maaf kalau salah 🙂