Question

Two men can do a work in 6hours and 4 hours respectively. one men work for 2 hours than other man join how much time they will do the work

Answer 1

they will do in 1 hour (1/6+1/4+1/2) work
= 11/12
so they will do 11/12 part work in one hour
so .... they will finis the work in 12/11 hour