The scale of a map is 1:50 000. Determine the actual distance in km if the measurement on the map is 4cm?

To determine the actual distance in km, we need to multiply the measurement on the map by the scale factor.

Scale factor = 1/50,000

Measurement on the map = 4 cm

Actual distance = Measurement on the map x Scale factor
Actual distance = 4 cm x 1/50,000
Actual distance = 4/50,000 km
Actual distance = 0.00008 km

Therefore, the actual distance in km if the measurement on the map is 4cm is 0.00008 km.