Rory collects rainwater. He has 100 L of rainwater in his tank. During a heavy rainstorm, water flows into the tank at a rate of 2 L/min for 90 minutes. How much water is in the tank at the end of the heavy rain? Give me reasons, before answering the question
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During the heavy rain, the tank collects 2 * 90 = 180 L of water. The tank has a total of 100 + 180 = 280 L of water. So the final answer is 280.
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