if 7 men can do a piece of work in 9 days how long would 21 men take to do
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1
3 days will be the answer
(7×9)/21= 3 days will be the answer
(7×9)/21= 3 days will be the answer
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2
if 7 men do a piece of work in 9 days
then 21 men do the same work in 3 days
then 21 men do the same work in 3 days
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