a rectangular sheet of metal is 1.2 metres long and 80 centimetres wide.
a badge_making machine cuts circles of metal from this sheet
a) find the maximum number of circles of diameter 4cm that can be cut from the sheet
b) sally says that less than 25% of the metal is wasted is sally correct? explain why.
c) the diameter 4cm is only correct to the nearest millimetre. What differebce could this make to the answers to part a?
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