p = 60 - 2(5) cm
p = 60 - 10 cm
p = 50 cm
–
l = 42 - 2(5) cm
l = 42 - 10 cm
l = 32 cm
→ L. karton - L. foto
→ (60 cm × 42 cm) - (50 cm × 32 cm)
→ 2.520 - 1.600 cm²
→ 920 cm²
Penjelasan dengan langkah-langkah:
lebar karton = lk = 60 cm
tinggi karton = tk = 42 cm
lebar foto = lf = 60 – 5 – 5 = 50 cm
tf/lf = tk/lk
tf/50 = 42/60
tf = 50 x 42/60
tf = 5 x 420/60
tf = 5 x 7
tf = 35 cm
Luas sisa karton tidak tertutup foto
= 60 x 42 – 50 x 35
= 2.520 – 1.750
= 770 cm²
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p = 60 - 2(5) cm
p = 60 - 10 cm
p = 50 cm
–
l = 42 - 2(5) cm
l = 42 - 10 cm
l = 32 cm
→ L. karton - L. foto
→ (60 cm × 42 cm) - (50 cm × 32 cm)
→ 2.520 - 1.600 cm²
→ 920 cm²
Penjelasan dengan langkah-langkah:
lebar karton = lk = 60 cm
tinggi karton = tk = 42 cm
lebar foto = lf = 60 – 5 – 5 = 50 cm
tf/lf = tk/lk
tf/50 = 42/60
tf = 50 x 42/60
tf = 5 x 420/60
tf = 5 x 7
tf = 35 cm
Luas sisa karton tidak tertutup foto
= 60 x 42 – 50 x 35
= 2.520 – 1.750
= 770 cm²