Sometimes 60% Marks is better than 90% | Motivation Video

A student got 24% marks in an exam and he failed by 56 marks. If he got 60% marks, then his marks are 70 more than the minimum passing marks. What is the maximum marks for the exam?

A first order reaction takes 100 min for completion of 60% of the reaction. Find the time when 90% of the reaction will be completed

A first order reaction takes 100 minutes for completion of 60% of the reaction. Find the time when 90% of reaction will be completed.