Scuba Steve is trapped in an underwater cavern with a leaking oxygen tank. He has 90 seconds to swim 200 feet to the exit. He cannot swim fast enough at his normal speed of 2 feet per second. Luckily, he notices a strong underwater current 30 feet above him that flows directly toward the exit at 2 feet per second. Scuba Steve swims at an angle toward the current to utilize its speed and minimize his travel time. He calculates how far to swim in the current before continuing directly toward the exit.