15 ആളുകൾ ചേർന്ന് ഒരു ജോലി 18 ദിവസം കൊണ്ട് തീർക്കും. എന്നാൽ അതേ ജോലി
10 ആളുകൾ എത്ര ദിവസം കൊണ്ട് തീർക്കും ?
A27
B25
C26
D28
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