10 ആളുകൾക്ക് ഒരു ജോലി ചെയ്യാൻ 8 ദിവസം വേണം. അതേ ജോലി ചെയ്യാൻ
20 ആളുകൾക്ക് എത്ര ദിവസം വേണം ?
A20
B16
C18
D4
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