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​Q20: Answers – Paper 2 – June 2018
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Here is an inflated swimming ring with dimensions in centimetres.

The volume of the ring, V cm3 , is given by

Work out the volume when      a = 20     and      b = 30
Give your answer to 3 significant figures.
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20)
​Here is an inflated swimming ring with dimensions in centimetres.

The volume of the ring, V cm3 , is given by

Work out the volume when      a = 20     and      b = 30
Give your answer to 3 significant figures.
[3 marks]