tolong di bantu ya kakak

p : l : t = 4 : 2 : 3
misal
p = 4x cm
l = 2x cm
t = 3x cm

diagonal sisi
= √p^2 + l^2
= √(4x)^2 + (2x)^2
= √16x^2 + 4x^2
= √20x^2
= x√20 cm

diagonal ruang = √261
= √(diagonal sisi)^2 + t^2
= √(x√20)^2 + (3x)^2
= √20x^2 + 9x^2
= √29x^2
= x√29 cm

x√29 = √261
x = √261/29
x = √9
x = 3 cm

Jadi,
Panjang = 4x = 4(3) = 12 cm
Lebar = 2x = 2(3) = 6 cm
Tinggi = 3x = 3(3) = 9 cm