Dev, Neeraj and Pankaj ma ke ten mocks in 25 days. If efficiency of Dev and Pankaj together three times the Neeraj and Dev and Neeraj together are two times of Pankaj then in how many days Neeraj complete ten mocks?
(a) 100 days
(b) 80 days
(c) 120 days
(d) 90 days
Sol:
