Math, asked by archana28091981, 17 days ago

One man can do a piece of work in 3 hours ;another can do the same piece of work in 2 hours. How long they will take, if they work together? ​

Answers

Answered by mrsgauswami
0

Answer:

Let one hour work of first man be=x

Let one hour work of other man be =y

Total work to be done =z=3x=2y

Let them take n hours to complete the work together

⇒n(x+y)=z

⇒n(x+y)=3x

⇒n(x+

2

3x

)=3x

⇒n(

2

5x

)=3x

⇒n=

5

6

=1.2 hours

or (1.2×60=72 minute

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