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Question: 7b tammy plans on grading the land so that it...

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7b) Tammy plans on grading the land so that it serves as the main catchment area for a pond at its lowest elevation. To maintain the water level in the pond it is estimated that at least 10 mega litres of rain must flow into the pond each year. ( 1 ML = 1000000L)If 40% of the rain that falls on the land flows into the pond, calculate the amount of rainfall in millimeters that needs to fall on the land each year to maintain the water level in the pond. Round answer to nearest 10mm.

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