medium · GMAT Quant
A river boat travels 48 miles upstream and then 48 miles downstream back to the start. The upstream speed is 8 mph and the downstream speed is 12 mph.
What is the boat's average speed for the round trip, in mph?
- 8
- 9
- 9.6
- 10
- 12
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- What is the final price of the jacket?
- How many total ways can the traveler get from City X to City Z?
- What is the speed of the current?
- Which of the following includes the number 0?
- If the child picks one letter at random, what is the probability that it is a consonant?
- Which of the following expressions must result in a positive value?
- Which of the following must also be an even integer?