A tank contains 1800 L water. 650 L is used and 250 L is added. Find the final quantity.
Explanation
To find the final quantity of water in the tank, we need to subtract the amount used and add the amount added. The initial quantity is 1800 L, 650 L is used, and 250 L is added. So, the final quantity is 1800 - 650 + 250 = 1400 L. However, the question asks for the final quantity after the addition, so we need to add 250 L to the remaining quantity after the subtraction, which is 1800 - 650 = 1150 L. Therefore, the final quantity is 1150 + 250 = 1400 L.
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