one man can do a piece of work in 3 hours, another man can do the same piece of work in 2 hours. how will they take if they work together
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work done in 1 hour =1/3 hours
work done by another man = 1/2 hours
together work done in 1 hour = 1/3 +1 /2
= 2 + 3 / 6
=5/6
now work done together = 1/(5/6 )
=6 /5
= 1 hours and 20 minutes , that is 1.2 hours
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