3 men can do a certain work in 12 days Two of men work twice as fast as the third man.How long will it take for the slow man to complete the work alone.
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let working speed of first person=2x
working of second person=2x ------ given
working of third person= X -------acc. to q
2x + 2x + X = 5x
it means 3 people do certain work in 12 days
2x+2x+X=12 days
5x = 12
X=12/5
X= 2.4 days
since, trird person do its one day work in 2.4 days
therefore work of 12 days = 12*2.4
= 28.8 days
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