How did Egypt become united? who was able to accomplish this and how?

Menes sent an army down the Nile and defeated the king of Lower Egypt in battle. In this way Menes united the two kingdoms. Unification means the joining together of two separate parts, in the case, the two kingdoms. Menes, sometimes known as Narmer, became the first pharaoh.

12 days because 1/4 is 25% of 100 if 100 is equal to 1 pound then multiply 3 by 4 which equals 12