How far is Sta. 21+00 from Sta. 23+00?

Answer: B — 200 feet

To determine the distance between Sta. 21+00 and Sta. 23+00, it is important to understand how stationing works in highway construction. Stationing uses a system of marking specific points along a roadway, with the numbers representing the distance in feet from a designated reference point, called the baseline. The notation "Sta. 21+00" means 21 stations plus 00 feet, which equals 2,100 feet. Similarly, "Sta. 23+00" means 23 stations plus 00 feet, totaling 2,300 feet. To find the distance between these two stations, you would subtract the lower station value from the higher one: 2,300 feet (Sta. 23+00) - 2,100 feet (Sta. 21+00) = 200 feet. Thus, the correct answer, which corresponds to a distance of 200 feet, is based on this fundamental understanding of stationing in construction practices.