Question

Quis Quis jawab dengan benar ​

Answer 1

Penjelasan dengan langkah-langkah:

rumus Lp persegi lanjang = 2×[p×l+p×t+l×t]

balok 1

2×[(12×5)+(12×5)+(5×5)]

2×[(60)+(60)+(25)]

2×145=290 cm²

balok 2

2×[(18×5)+(18×6)+(5×6)]

2×[(90)+(108)+(30)]

2×228=456 cm²

ditotal balok 1+balok 2=290+456= 746 cm²

Answer 2

Jawaban:

La ᵇᵃˡᵒᵏ ᵏᵉᶜⁱˡ

=> p x l

=> 12 x 5

=> 60cm²

Lpᵇᵃˡᵒᵏ ¹

=> 2(p x l + p x t + l x t)

=> 2(12 x 5 + 12 x 5 + 5 x 5)

=> 2(60 + 60 + 25)

=> 2(145)

=> 290cm²

Lpᵇᵃˡᵒᵏ ²

=> 2(p x l + p x t + l x t)

=> 2(18 x 5 + 18 x 6 + 5 x 6)

=> 2(90 + 108 + 30)

=> 2(228)

=> 456cm²

Lp gabungan-

=> Lpᵇᵃˡᵒᵏ ¹ + Lpᵇᵃˡᵒᵏ ² - La ᵇᵃˡᵒᵏ ᵏᵉᶜⁱˡ

=> 290cm² + 456cm² - 60cm²

=> 686cm²

opsi => -

note: luas permukaan itu luas bagian luarnya saja.