20. Balok PORS.TUVW memiliki volume 22.680 cm. Jika perbandingan rusuk panjang

Penjelasan dengan langkah-langkah:

V = p. l. t

22680 = 5x (12x) 14x

22680 = 840x³

22680/840 = x³

27 = x³

3 = x

p = 5x = 5(3) = 15 cm

l = 12x = 12(3) = 36 cm

t = 14x = 14(3) = 42 cm

Diagonal bidang

= √(15²+36²)

= √(225+1296)

= √(1521)

= 39 cm….

Jawaban:

D.39 cm

Penjelasan dengan langkah-langkah:

Misal

p = 5x

l = 12x

t = 14x

Volume = p × l × t

22.680 = 5x × 12x × 14x

22.680 = 840x³

x³ = 22.680/840

x³ = 27

x = ³√27

x = 3 cm

p = 5x = 5(3) = 15cm

l = 12x = 12(3) = 36cm

t = 14x = 14(3) = 42cm

Panjang diagonal bidang

= √(15² + 36²)

= √(225 + 1.296)

= √(1521)

= 39 cm(D)