Speed, Time, Distance : CAT 2016 Online Preparation
Question 4 the day : February 23, 2004
The question for the day is based on some basic Speed, Time and Distance concepts and is about average speeds.
Question
Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph?
 42 mph
 36 mph
 37.5 mph
 42.5 mph
Correct Answer is 37.5 mph . Choice (3) is right.
Explanatory Answer
Average speed = .
Total distance traveled by Jim = Distance covered in the first 3 hours + Distance covered in the next 5 hours.
Distance covered in the first 3 hours = 3 * 60 = 180 miles
Distance covered in the next 5 hours = 5 * 24 = 120 miles
Therefore, total distance traveled = 180 + 120 = 300 miles.
Total time taken = 3 + 5 = 8 hours.
Average speed = = 37.5 mph.
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