Panjang pita semula
Sn = n/2 . (a + Un)
S10 = 10/2 . (20 + 155)
S10 = 5 . 175
S10 = 875 cm
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Panjang pita semula
Sn = n/2 . (a + Un)
S10 = 10/2 . (20 + 155)
S10 = 5 . 175
S10 = 875 cm