Free Practice Question
PS · Problem Solving
sub-505
Distance/Rate Problems
Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then 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
Answer Choices
Correct answer marked belowA
35
40
Correct
C
45
D
50
E
55
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Explanation
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Sign in to commentWhat this question tests
What it tests
Your application of distance = rate × time to trains, boats, and commuters, including relative speed.
Common trap
Mixing units (miles per hour vs. minutes) or averaging speeds — average speed is total distance over total time.
Details
Difficulty
sub-505
Type
PS
Category