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8 - 30
10 - x
8/10 = x/30
10x = 8 x 30
10x = 240
x = 24
8 org ----- > 32 hr
8org -----> 30 hr
10 0rg -----> x hr
X = 8*30 /10 = 240/10 = 24 hari lagi ...c