Question: A rectangular swimming pool is 2 m deep, 12 m wide and 20 m long. The desired water depth is 5 ft. The pool is empty when a hose is placed over the edge of the pool.
Part A: If the water flows into the pool at a rate of 125 gallons per minutes, how long does it take for the water to reach the depth of 5ft?
Please give me an explanation for above question.