Hello there!

Greetings!

First of all I would like to advice you that , you should attempt lengthy time taking questions only at the end once you are done  with all the easy questions,  now coming to how to tackle these kind of questions you need to remember one thing which is to first read what has been asked to find in the question and then read it noting important values given by underlining them and then link them with formula and concepts and solve to find the answer.

Thankyou