A tank initially holds 160 L. A tap adds 19 L/min while a drain removes 9 L/min for 8 minutes. How much water is in the tank then?

Question: A tank initially holds 160 L. A tap adds 19 L/min while a drain removes 9 L/min for 8 minutes. How much water is in the tank then?

1. 250 L
2. 240 L
3. 230 L
4. 260 L

Correct Answer: B — 240 L

Explanation: Final tank volume = initial volume + (inflow rate − outflow rate) × time.
160 + (19 − 9) × 8 = 240 L.