This GMAT quant practice question is from rates - speed, distance, and time. The concept tested is to compute the average speed of travel. An easy, GMAT 550 level, quantitative reasoning sample question.

Question 6: Steve traveled the first 2 hours of his journey at 40 mph and the remaining 3 hours of his journey at 80 mph. What is his average speed for the entire journey?

- 60 mph
- 56.67 mph
- 53.33 mph
- 64 mph
- 66.67 mph

@ INR

Average speed of travel = \\frac{\text{Total distance travelled}}{\text{Total time taken}})

Total distance traveled by Steve = Distance covered in the first 2 hours + distance covered in the next 3 hours.

Distance covered in the first 2 hours = speed × time = 40 × 2 = 80 miles.

Distance covered in the next 3 hours = speed × time = 80 × 3 = 240 miles.

Therefore, total distance covered = 80 + 240 = 320 miles.

Total distance travelled = 320 miles.

Hence, average speed = \\frac{\text{Total distance travelled}}{\text{Total time taken}} = \frac{320}{5}) = 64 miles per hour.

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