Question

Roma & Rohit can complete a work in 20 days. Rohit and sobha can complete the work in 15 days .Let calculate in how many days they will complete the work together?

Answer 1

Three steps solution

Step-by-step explanation:

Rohit and roma complete the work = 20 days and

rohit and sobha complete the work = 15 days

Taking LCM to calculate the Total work ,

Then , total work = 60

Work done in one day  by roma and rohit = 3

Work done in one day by rohit and sobha = 4

They will completed the work together  = $\frac{60}{7}$

Completed the work together = $8\frac{4}{7}$ day