3. A housewife has a sufficient charcoal to last 14 days provided she uses on 2 buckets of charcoal a day. How long the charcoal will last if she uses 3 buckets a day?
Proportion _ : _ = _ : _
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3. A housewife has a sufficient charcoal to last 14 days provided she uses on 2 buckets of charcoal a day. How long the charcoal will last if she uses 3 buckets a day?
Proportion _ : _ = _ : _
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Answer:
2:1:14=3:1:?
21 days
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