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Mathematics, 24.10.2021 14:00 HotWheels162000

This is a pond in the shape of a prism. It is completely full of water. Colin uses a pump to empty the pond. The level goes down by 30cm in 30 minutes. Work out how many minutes Colin has to wait for the pond to completely empty.
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This is a pond in the shape of a prism. It is completely full of water. Colin uses a pump to empty

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