Problem 1 8 irodov

Tried to solve in efficient way, with minimum number of steps. I have taken into consideration the level of knowledge of person at 12th standard in India. Specially designed for students going for IIT main and advanced as well as going for NEET. I have made these videos as self-explanatory as possible requiring least background knowledge, in case of any doubt let me know on comments and I will try to give solution particularly or by making further videos.