Nautical miles

How many nautical miles do they sail if the route is shown on a 1:25 000 scale map with a 7.4 cm long line?

Correct result:

x =  1 nm


M=25000 a=7.4 cm m=7.4/100  m=0.074 m  x1=a M=0.074 25000=1850 m x=x1/1852=1850/1852=925926=1 nm

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