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Panjang Tiang Bayangan: 5m(PTB)
Tinggi Anak Sebenarnya: 145cm(TAS)
Panjang Bayangan Anak: 2m(PBA)
Ditanya: Tinggi tiang sebenarnya?(x)
TAS/X =PTB/PBA
145/X=5/2
Kali silang
5X=290
x=290/5
x=58Cm