Question

Together,chotu and nitu plough a field in 4 days. nitu alone takes 6 days to plough the same field .in how many days can chotu alone plough the field?

Answer 1

He will take 12 days alone

Answer 2

N+C =4d. efficiency=3
N=6d. efficiency=2
LCM(4,6)=12 this is total work
now c will do in =12/(3-2) =12days