The water in the tank's weigh is 1310.4 pounds/feet³
<h3>
Further Explanation</h3>
From the problem above we know that:
The water's weighs = 62.4 pounds/foot³
The tank measurement = 7 ft x 4 ft x 9 inch
<u>First step</u>
We are going to convert the tank's measurement into foot
1 inch = 0.083 foot, so 9 inches would be

Second step
We are going to find the tank's volume
feet³
with the proportional calculation we going to find the tank's water weigh when it is full. The tank's water weigh would be in x variable


So, the weigh of the water in tank is 1310.4 pounds/feet³
<h3>Learn more</h3>
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Keywords: weigh, tank's volume, calculate volume