Susan drove an average speed of 30 miles per hour for the first 60 miles of a tripthen at a average speed of 60 miles/hr for the remaining 30 miles of the trip if she made no stops during the trip what was susan's avg speed in miles/hr for the entire trip	Choose the correct answer:	A) 35	B) 36	C) 45	D) 50	E) 55
Avg. speed = total distance / total time   Total distance = 90 miles   Total time = 60 / 30 + 30/60 = 5/2   Avg. speed = 36   Answer - 36
<result>B</result>
Susan drove an average speed of 30 miles per hour for the first 60 miles of a tripthen at a average speed of 60 miles/hr for the remaining 30 miles of the trip if she made no stops during the trip what was susan's avg speed in miles/hr for the entire trip