Two planes leave simultaneously from Salt Lake City International, one flying due north and one due east. The northbound plane is flying 60 miles per hour faster than the east bound plane. After 2 hours the planes are 993 miles apart. The speed of the slower plane is miles per hour. Round your answer to the nearest mile per hour. Assume the earth is flat---this is wildly inaccurate over a distance of 993 miles!
Hint: Use the Pythagorean Theorem.