How to solve those 2D DILR sets in mocks its been really tough to solve

try solving it by pen on a sheet of paper

Firstly get your basics right regarding these sets, as they dont involve complicated theories or concepts but just your understanding of the network/critical path given. Try to make a note of the important information provided in the set. Initially aisa hoga ki poora routes dikhega nahi aapko, but eventually you will get through with practice

Thank you!