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Here is an inflated swimming ring with dimensions in centimetres.

The volume of the ring, *V* cm^{3} , is given by

Work out the volume when

Give your answer to 3 significant figures.

*a*= 20 and*b*= 30Give your answer to 3 significant figures.

**Question**

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20)

Here is an inflated swimming ring with dimensions in centimetres.

The volume of the ring, *V* cm^{3} , is given by

Work out the volume when

Give your answer to 3 significant figures.

*a*= 20 and*b*= 30Give your answer to 3 significant figures.

**[3 marks]**