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To find the volume of the pool, we use the formula for the volume of a rectangular prism, which is length x width x height.
Volume of pool = 35ft x 28ft x 6ft = 5880ft^3
Now, we divide the volume of the pool by the rate at which water is pumped out to find how many hours it will take to empty the pool:
Time to empty pool = 5880ft^3 รท 294ft^3 per hour = 20 hours
Therefore, it will take 20 hours to empty the pool.