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42 / 60 Marks
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 20 cm in the first 30 minutes.
Work out how many minutes Colin has to wait for
the pond to completely empty.
2 m
1.4 x 2 x 1
2.8 m - 281
280/20 =
14 x 30 = 4
0.6 m
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1.4 m
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