Question

Mohan can do a piece of work in 4day and sohan in 5 days -how long will they take to do some work,when working together?

Answer 1

Step-by-step explanation:

Let the piece of work done by Mohan in 4 day = 1

therefore , the work done by Mohan in one day = 1/4

similarly , let the piece of work done by Sohan in 5 days = 1

therefore , the work done by Sohan in one day = 1/5

then , Mohan and Sohan work together

= 1/4 + 1/5

= 5 + 4 /20

= 9/ 20

So if both Mohan and Sohan do some work they done in 9/20

thus ,

they both complete the task in 2 2/9