Bantu ya... + pake cara :)

23.Luas bidang diagonal = r²√2
25 √2 = r²√2
25 = r²
r = 5
luas permukaan = 6r²
L = 6(5²)
L = 6(25)
L = 150 cm² . A .

24. Luas Sisi Kubus = 1350
6a² = 1350
a² = 1350 ÷ 6
a² = 225
a = 15
Vkubus = a³
Vkubus = 15³
Vkubus = 3375 cm³ . C .