Question

Berapa luas permukaan balok dengan ukuran sebagai berikut lalu hitunglah volume nya
- A = 8cm X 4cm X 2cm
- B = 8 cm X 3 cm X 4 cm
- C = 9 cm X 9cm X 6 cm
- D = 9cm X 8 cm X 4 cm

cepet ya :)

Answer 1

Lp = 2 (pl + pt + lt)
V = p x l x t
A.) = 2 (8x4 + 8x2 + 4x2)
= 2 ( 32 + 16 + 8 )
= 2 ( 56 )
= 112 cm^2

V=8x4x2
=64 cm^3

B.) LP = 2 ( 8x3 + 8x4 +3x4)
= 2 (24 + 32 + 12)
= 2 (68)
=136

V = 8x3x4
= 96

C) Lp = 2 (9x9 + 9x6 +6x9)
= 2 ( 81 + 54 + 54)
= 2 (189)
= 378

V = 9 x 9 x 6
= 486

D.) Lp = 2 (9x8+9x4+8x4)
= 2 ( 72 + 36 + 32)
= 2 ( 140)
= 280

V = 9x8x4
=288

semoga membantu:)

Answer 2

-A
luas permukaan = 2(32 + 16 + 8)
= 2(56) = 112 cm²
volume = 8 x 4 x 2 = 64 cm³

-B
luas permukaan = 2(24 + 32 + 12) = 2(68) = 136 cm²
volume = 8 x 3 x 4 = 96 cm³

-C
luas permukaan = 2(81 + 54 + 54) = 2(189) = 378 cm²
volume = 9 x 9 x 6 = 486 cm³

-D
luas permukaan = 2(72 + 36 + 32) = 2(140) = 280 cm²
volume = 9 x 8 x 4 = 288 cm³