Question

kak tolong jawab ini​

Answer 1

Jawaban dengan Langkah Langkah

Luas permukaan Balok = 2 × ( p.l + l.t + p.t )

1) 2 × ( 10.4 + 4.3 + 10.3 )

2 × (40 + 12 + 30 )

2 × 82

164 cm²

2) 2 × ( 12.8 + 8.7 + 12.7 )

2 × ( 96 + 56 + 84 )

2 × 236

472 cm²

3) 2 × ( 20.15 + 15.10 + 20.10 )

2 × ( 300 + 150 + 200 )

2 × 650

1300 cm²

Answer 2

Jawaban:

Rumus Luas permukaan balok :  = 2 ×(p × l + p × t + ℓ × t)

1. L = 2 × ( (10× 4) + (10 × 3) + ( 4 × 3) )

L = 2 × ( 40 + 30 + 12 )

L = 2 × ( 82 )

L = 164 Cm2

2. L = 2 ×(( 12 × 8 ) + ( 12 × 7 ) + ( 8 × 7 ))

L = 2 × ( 96 + 84 + 56 )

L = 2 × ( 236 )

L = 472 Cm2

3. L = 2 × (( 15 × 12 ) + ( 15 × 10 ) + ( 12 × 10 ))

L = 2 × (180 + 150 + 120 )

L = 2 × (450)

L = 900 Cm2

4. L = 2 × (( 20 × 15 ) + ( 20 + 10 ) + ( 15 × 10 ))

L = 2 × (300 + 200 + 150 )

L = 2 × ( 650 )

L = 1300 Cm2

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