Explanation 5 women paints the wall in 30 hours
1 women will paint in 5*30=150 hours
3 women will paint in 150/3=50 hours
let total work done be x
after 16 hours work done by 5 womens will be:16x/30=8x/15
remaining work is: x-(8x/15)=7x/15
now this work has to be finished by remaining 3 womens
time taken by 3 womens is 50 hours so 7x/15 work part will be finished by them in:
(50/x)*(7x/15)=70/3
hence the total time taken by them to finish the entire work is:
16+(70/3)=118/3