Hi,
The opening problem of Chapter 9 - Guide 3 "Word Problems" assumes only 16cm of overlapping (4 x 4cm). In my view there are in fact 32cm to account for two wired that overlap four times (4 x 4cm x 2). The stem might be correct but the draw made clear that the 4cm is not the sum of both wires but the section.
Am I corect? Or what did I get wrong?
Tks.