medium · GMAT Quant
A chemical reactor consumes cooling fluid at 2 liters per minute for the first 40 minutes of a reaction. At the 40-minute mark, an exothermic transition requires high-flow cooling at 5 liters per minute for the remaining duration.
How many total minutes did the reaction run if it consumed 230 liters of cooling fluid?
- 46
- 60
- 70
- 75
- 115
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