hard · GMAT Quant
Two grid storage battery stations, Station A and Station B, initially hold a combined total energy reserve of 800 megawatt-hours (MWh). Station A transfers dfrac13 of its stored energy to Station B. Next, Station B transfers dfrac14 of its updated stored energy back to Station A. During this second transfer, line resistance causes an unrecoverable loss of 20 MWh of energy before reaching Station A.
If Station A and Station B end with identical amounts of stored energy, what was the initial stored energy, in MWh, at Station A?
- 380
- 390
- 400
- 420
- 520
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?