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How much is a Kilogram? Read to know about the history and latest changes to kilogram

I raised my hand as high as I could, sitting in the third row of benches in my class, hoping that our chemistry teacher will notice me and ask me for the answer which I believed I had calculated correctly before rest of the class. I strategically chose third row of benches throughout my student life as I believed that third row students got just the right attention from the teachers and were at lower risk of being asked to produce the homework and classwork assignments that teachers could show to the rest of the class as examples of good or bad work. “27.9”, I said, beaming with confidence when Pandey Sir nodded at me after seeing me raising my hand. Waiting for my appreciation from him, I never anticipated the kind of mockery I was going to become in next minute. Pandey Sir being one of the strictest teacher, yet a fun-loving person who would not miss any opportunity to crack a joke, asked me back, “27.9 Kilometers or 27.9 metre per second square?”. The whole class burst int