December 2018 1 19 Report
Besi dengan panjang100cm dipanaskan sehinnga panjangnya betambah 10%dan sesudah itu besi itu didinginkan kembali sehingga panjangnya berkurang 10 %. panjang besi sekarang adalah.....

a.100
b.99
c .95
d .90

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