Question

Advesh can do a certain electric work in the same time in which Pavan and Druv can do it together. If Advesh and Pavan together could do it in 20 days and Druv alone in 60 days, then Pavan alone could do it in:

Q: Answer-Advesh can do a certain electric work in the same time in which Pavan and Druv can do it together. I...

Let the total work be 1 unit. Druvs 1-day work 160 Advesh and Pavan together 1-day work 120 Advesh alone does the same work as Pavan and Druv together, so Adveshs 1-day work Pavans 1-day work Druvs 1-day work Let Pavans 1-day work P Then Adveshs 1-day work P 160 So, P P 160 120 2P 160 120 2P 120 - 160 3 - 160 260 130 P 160 So, Pavan alone can do the work in 60 days.