Pat and Cathy begin running at the same time and they start at the same place on a straight path. Pat runs at 9 miles per hour, and Cathy runs at 8 miles per hour. After 30 minutes, Pat stops to stretch. If it takes Pat 15 minutes to stretch and Cathy continues to run during this time, how many minutes will it take Pat to catch up to Cathy? Choose one
A) 50	B) 60	C) 70	D) 80	E) 90
In 30 minutes, Pat runs 4.5 miles.   In 45 minutes, Cathy runs 6 miles.   Pat can catch Cathy at a rate of 1 mile per hour.   Since Cathy is ahead by 1.5 miles, it will take Pat 1.5 / 1= 
<gadget id="calculator">1.5 / 1</gadget>
<output>1.5</output>
1.5 hours= 90 minutes to catch Cathy.   the answer is 90.
<result>E</result>
Pat and Cathy begin running at the same time and they start at the same place on a straight path. Pat runs at 9 miles per hour, and Cathy runs at 8 miles per hour. After 30 minutes, Pat stops to stretch. If it takes Pat 15 minutes to stretch and Cathy continues to run during this time, how many minutes will it take Pat to catch up to Cathy?