One morning, Justin drove 2 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If be completed a 340-mile trip in 6 hours of driving time, how fast did he drive in the morning? mph A plane can fly 375 mph in still air. If it can fly 220 miles downwind in the same amount of time it can fly 155 miles upwind, find the velocity of the wind. mph