A tank is filled with 150 liters of water. If 20% is evaporated and then 30 liters are added, what is the final volume of water in the tank?

Sun, 03 May 2026 00:23:24 +0000

**Why Are More People Talking About Water Tank Equations in 2025?**
If you’ve been scrolling through US-focused smart home or property tweaks, you may have noticed growing interest in how water tanks function under real-world conditions. This simple equation—150 liters, 20% evaporation, then 30 liters added—has become a go-to example in household water management discussions. With rising concerns over water scarcity, seasonal storage, and efficient resource planning, small but impactful calculations like this are shaping how people approach sustainable living. The tank’s behavior mirrors bigger water dynamics: evaporation, refill, and volume accuracy—topics now central to household efficiency discussions. **Understanding the Water Loss and Refill Process**
A tank filled with 150 liters of water begins with a clean, full baseline. When 20% of the water evaporates, the loss amounts to 30 liters—since 20% of 150 liters is 30 liters. This means 120 liters remain. Adding 30 liters back then raises the total to 150 liters. Far from a simple drop in volume, this process reveals key principles in environmental measurement: evaporation is dynamic, especially in warmer climates, and storage efficiency depends on knowing both inputs and losses. This simple reset highlights how precise tracking—down to liters—matters in managing finite resources. **Common Questions About Water Tank Calculations**
Many users ask:
- *Does evaporation reduce the total volume permanently?*
Yes—evaporated water isn’t restored unless refilled.
- *Does adding water automatically return it to the original level?*
Only if volume matches input; here, adding exactly 30 liters recovers the full volume.
- *Can small evaporation losses impact long-term storage?*
Absolutely—especially in large tank systems or during dry seasons. Tracking