How to determine the scale of the map if I know how many meters I have in 1 cm?

Question

Cartography

Good afternoon!
I have a map, on which a car (which is 5.1 meters long) occupies 7 centimeters 73 mm.
How to calculate map scale?
To write "Scale 1:XXXX"
Thank you!

Answer 1

If relative to the Mercator projection, well, the one that Google uses, but it matters at what latitude this very car is.
And so if the scale is 1:1000000, then this is a 1 cm map - a million centimeters or 10 km of terrain. But if you read the postscript on the maps that hung on the walls in Soviet times, then it says that this is a medium scale or a scale only at the equator.
In your case, 1cm cards, 66cm cars.