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Tg = 100 m
Bg = 25 m
Bg x Tt = Bt x Tg
25 x Tt = 5 x 100
Tt= 500 : 25
Tt = 20 m
panjang bayangan tiang (x2) = 25 m
tinggi gedung (y2) = 100 m
dit : tinggi tiang (y1) ?
x1 per x2 = y1 per y2
5 per 25 = y1 per 100
pindah ruas
y1 = 5 per 25 di kali 100
y1 = 500 bagi 25 = 20 m
jadi, tinggi tiang nya adalah 20 m