Q$4)$ A planimeter with arm length $=180mm$ was used to calculate an area on a map, the real area is $5m^2,$ and the planimeter reading is $5000$ digits, what is the scale of the map?

$\backslash$table$[[,$Tracer Amm Length$],[,\frac{A(180)}{\text{a}\text{r}\text{a}\text{a}\text{l}\text{d}\text{o}\text{t}},\backslash$table$[[\frac{B(144)}{\text{a}\text{r}\text{e}\text{a}}$digt