Question

The Neva River in St. Petersburg, Russia, is 74 km long. How long is it on a map drawn at a scale of 1:500,000?

Answer 1

14.8

Explanation:

Answer 2

1:500,000 means 1 cm on the map is 500,000 cm on the ground
74 km= 74,000 m = 7,400,000 cm

1 cm on the map---- 500,000 cm
x cm on the map ---- 7,400,000 cm

x=1*7,400,000/ 500,000 =74/5= 14.8 cm

Neva river is 14.8 cm long on the map.