What was the average rate of speed , in miles per hour , that he drove ?

Nico Left His apartment in New York City at 11:00 a.m. and drove to Washington D.C. He drove without stopping and arrived in Washington, D.C. at 3:00 p.m. if the distance between the two cities is 228 miles what was the average rate f speed in miles per hour that he drove . Show Work ? Please help me I'm suck