Question 1154985
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The cross sectional area of the tank is 4m times 2m, which is 8 square meters.<br>
The added 4000 liters is 4 cubic meters; in the tank with a cross sectional area of 8 square meters, the depth will be 0.5m.<br>
The initial depth was 3/4 of 4.8m, or 3.6m; after the 4000 liters are added, the depth will be 3.6+0.5 = 4.1m.<br>