Posted by **Mat** on Monday, May 20, 2013 at 10:17pm.

A manufacturer wishes to produce the most economical packaging for detergent.

The containers need to hold 25litres and must be cylindrical in shape. What

dimensions will ensure that the least amount of plastic is used to create the

containers. (Note: the volume and surface area of cylinders are V =πr2h and

S = 2πr2 + 2πrh respectively)

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