The Neva River in St. Petersburg, Russia, is 74 km long. How long is it on a map drawn at a scale of 1:2,000,000?
Note that 74 km = 74000 m = 7400000 cm
So...it will be 7400000 / 2000000 = 37/10 cm = 3.7 cm on the map
Thank you so much!