Students Comment : 15th January, 2002 is. Not included since on that very day the item will not be available for use. May 15th is included since the person will go to buy the product on 15th May and may consume it throughout the day. Since it does not turn up the last day of the shelf life of 180 days as instructed in the question.

Students Comment : The Manufacturing date was 15th January, 2002 and I have included 16th January for calculation which gives 16 days for the Month of January in 2002, February month will be taken in full of 28 days as the year is non leap year. Please check once

Students Comment : Good evening sir, Your guidance is helping us a lot. But the copy is not properly visible due to small letter & recording problem.

Students Comment : Manufacturing date (15 Feb 2002) is not included when Calculating the total day of Jan 2002 (It should be 17 days not 16 days, Feb 28, Mar 31, Apr 30 and May should be 14). Please check the math uploaded on you tube one 15/04/2020