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Un=2,5m=250cm
U6=10+5b=250
10+b. =10_(dikurang)
5b=240
b=240:5=48
S6=1/2.n(a. 2+(n-1)b)
=1/2.6(10.2+(6-1)48)
=3. (20+(5)48)
=3. (20+240)
=3. (260)
=780cm=7,8m
Keterangan:a=tali terpendek
b=beda
n=jumlah keseluruhan tali yg
dipotong
Jadi,panjang keseluruhan dari tali tersebut adalah 7,8m