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Verified answer
Keliling 2 segitiga = 2(5+5+6)=2×16
=32 m
keliling 2 trapesium=2(4+5+5+10)
=2×24
=48m
kll atap= 32+48
=80m
biaya pembelian =40.000 ×80
=3.200.000 (d)
semoga membantu
#jadikan jawaban terbaik ya!
BAB = BANGUN DATAR
diketahui =
sisi miring segitiga = 5cm
alas segitiga = 6cm
sisi sejajar trapesium = 4cm & 10cm
ditanya = biaya pembelian galvalium per luas??
- mencari tinggi segitiga
t = √5² - (6/2)²
t = √25 - 3²
t = √25 - 9
t = √16
t = 4cm
luas 2 segitiga = 2 × ½ × a × t
= 2 × ½ × 6 × 4
= 6 × 4
= 24cm²
- mencari tinggi trapesium
t = √5² - (10-4/2)²
t = √25 - (6/2)²
t = √25 - 3²
t = √25 - 9
t = √16
t = 4cm
L.2 trapesium = 2 × ½(jumlah sisi sejajar) × t
= 2 × ½ (10+4) × 4
= 14 × 4
= 56cm²
luas atap :
= 24cm² + 56cm²
= 80cm²
biaya galvalium :
= 80cm² × 40.000
= Rp3.200.000,00
semoga membantu