Jawaban:
[tex]\displaystyle \rm \large \sf \bold{(E.) \:\:\:P = \frac{A - 2LT}{2(L + T)}}[/tex]
Penjelasan dengan langkah-langkah:
Pemulihan pilihan jawaban:
[tex]\[ \:\:(A.)\:\:\:P=\frac{L-2AT}{2(A+T)} \\\\\:\:(B.)\:\:\:P= \frac{2A-LT}{L(2+T)} \\\\\:\:(C.)\:\:\:P=\frac{A-LT}{2L+T} \\\\\:\:(D.)\:\:\:P= \frac{T-2AT}{2(A+T)}\\\\\:\:(E.)\:\:\:P=\frac{A-2LT}{2(L+T)}\][/tex]
Lanjut..
luas permukaan balok = A satuan luas
panjang = P satuan
lebar = L satuan
tinggi = T satuan
Rumus luas permukaan balok:
[tex]\displaystyle \rm \large \sf lpb= 2(pl + pt + lt)[/tex]
[tex]\displaystyle \rm \large \sf A= 2(PL + PT + LT)[/tex]
Maka, rumus panjang:
[tex]\displaystyle \rm \large \sf \frac{A}{2} = PL + PT + LT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A}{2} - LT = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A}{2} - \frac{2LT}{2} = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} = P(L + T)[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} \div (L+ T) = P[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2(L + T)} = P[/tex]
[tex]\displaystyle \rm \large \sf P = \bold{ \frac{A - 2LT}{2(L + T)}}[/tex]
Jawabannya E.
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Jawaban:
[tex]\displaystyle \rm \large \sf \bold{(E.) \:\:\:P = \frac{A - 2LT}{2(L + T)}}[/tex]
Penjelasan dengan langkah-langkah:
Pemulihan pilihan jawaban:
[tex]\[ \:\:(A.)\:\:\:P=\frac{L-2AT}{2(A+T)} \\\\\:\:(B.)\:\:\:P= \frac{2A-LT}{L(2+T)} \\\\\:\:(C.)\:\:\:P=\frac{A-LT}{2L+T} \\\\\:\:(D.)\:\:\:P= \frac{T-2AT}{2(A+T)}\\\\\:\:(E.)\:\:\:P=\frac{A-2LT}{2(L+T)}\][/tex]
Lanjut..
luas permukaan balok = A satuan luas
panjang = P satuan
lebar = L satuan
tinggi = T satuan
Rumus luas permukaan balok:
[tex]\displaystyle \rm \large \sf lpb= 2(pl + pt + lt)[/tex]
[tex]\displaystyle \rm \large \sf A= 2(PL + PT + LT)[/tex]
Maka, rumus panjang:
[tex]\displaystyle \rm \large \sf A= 2(PL + PT + LT)[/tex]
[tex]\displaystyle \rm \large \sf \frac{A}{2} = PL + PT + LT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A}{2} - LT = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A}{2} - \frac{2LT}{2} = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} = PL + PT[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} = P(L + T)[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2} \div (L+ T) = P[/tex]
[tex]\displaystyle \rm \large \sf \frac{A - 2LT}{2(L + T)} = P[/tex]
[tex]\displaystyle \rm \large \sf P = \bold{ \frac{A - 2LT}{2(L + T)}}[/tex]
Jawabannya E.