One gas cylinder is used to cook food for a family of 12 people for 60 days. If 6 more people join the family, how long will the gas cylinder last ?
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40 days.
(12 into 60) is 720.
720 divide by (12 plus 6)
Therefore, 72O upon 18.
That gives us 40.
So, 40 days is the answer.
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