Question

Tolong di jawab ya kk

Answer 1

Keliling alas = 2p + 2l

(=)  2(x+6) + 2(2x-8)
(=) 2x + 12 + 4x - 16
(=) 6x - 4

6x - 4 = 56
6x = 60
x = 10

panjang = x + 6 = 10 + 6 = 16 cm
lebar = 2x - 8 = 2(10) - 8 = 20 - 8 = 12 cm
tinggi = 3x - 6 = 3(10) - 6 = 30 - 6 = 24 cm

Luas permukaan :

PL + 2PT + 2LT
(=) (16)(12) + 2(16)(24) + 2(12)(24)
(=) 192 + 768 + 576
(=) 2136 cm²

volume = PLT
(=) (16)(12)(24)
(=) 4608 cm³