A tank initially contains 30 liters of water. Each hour 50 liters flow in while 14 liters flow out. How many liters will be in the tank after 5 hours?
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- Find the net increase of water in 1 hour.
- Calculate 30 + (50 − 14) × 5.
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Answer: 210
Each hour the amount increases by 50 − 14 = 36 liters. In 5 hours, 180 liters are added, so the tank contains 30 + 180 = 210 liters.