This cache has been published as part of the Chieveley Christmas Caper 2019. The final cache involves a short tree climb.
Northings) Given that this (cube shaped) present is 8cm tall, and the ribbon used to decorate it is 2cm wide; what area of the present, in square centimetres, is not covered by ribbon? This gives you ABC.
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Westings) Given that this (mini) Christmas tree is 20cm tall in total, 12cm at its widest, with a trunk 4cm wide and 4cm tall; what is the total area of the (2d) tree, including the trunk? (But not including the star). This gives you DEF.
When you have worked out the answers use this calculation to provide the co-ordinates:
N51 A(C+F).(D-E)(A+B+F)(C-D)
W001 B((A+B)x(D+F)).(C+E)(CxB)(B+D+C+E)