Pi was discovered way back already the way to Babylonians and Egyptians 216 BC but none were all the way accurate they were close
The answer is 136 136=36% of 400
The question is asking to calculate how fast is the water level rising when the water is 9 inches deep and base on the said question or problem, and in my own understanding and computation about the said problem, the speed of the rising of the water level is 24/63 feet per minute. I hope this would help
