October 2018 2 54 Report
Lempeng timah memiliki panjang 10cm dan lebar 2m pada suhu 25°C,timah itu dipanaskan sampai 150°c. Jika koefisien muai panjang  \alpha = 0,000029/°C ,pertambahan luas timah adalah...

a.0,073 cm²
b.0,145 cm²
c.0,218 cm²
d.0,292 cm²
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