Question

bantuin matematika kelas 8​

Answer 1

1,28 liter = 1.280 cm³

3 m = 300 cm

cari sisi alas:

• V = s² × t
• 1.280 = s² × 20
• s² = 1.280/20
• s² = 64
• s = √64
• s = 8 cm

K = 4(2s + t)

K = 4(2(8) + 20)

K = 4(16 + 20)

K = 4(36)

K = 144 cm

Jumlah kerangka

= Panjang kawat/kerangka balok

= 300/144

= 2,083

= 2 buah (hasil pembulatan)