A cistern has a leak which would empty it in 8 hours.A tap is turned on which admits 6 litres a minute in the cistern, and it is now emptied in 12 hours. How many litres does the cistern hold?
A8460 L
B4320 L
C8640 L
D4230 L
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12 ആളുകൾ ചേർന്ന് ഒരു ജോലി 15 ദിവസംകൊണ്ട് തീർക്കും. എന്നാൽ അതേ ജോലി 10 ആളുകൾ എത്ര ദിവസം കൊണ്ട് തീർക്കും?