This GMAT quant practice question is a rates - speed, distance, and time question covering the concept of computing average speed of travel.

#### 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
- 48 mph

#### Explanatory Answer

Video explanation will be added soon#### Compute total distance travelled and total time taken

Average speed = \\frac{\text{Total distance}}{\text{Total Time}}\\)

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.

#### Compute average speed

Average speed = \\frac{\text{Total distance}}{\text{Total Time}} = \frac{300}{8}\\) = 37.5 mph.

Choice C is the correct answer.

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