According to the road map that Rashmi has, 1 cm on the map equals to 18 km on road. If she covers a distance of 72 km on road, what distance does she cover on the map?
Let us assume that Rashmi covers a distance of x cm on the map.
The scale and distance in kilometre are directly proportional to each other. So,
A = distance in cm
B = distance in km
A1B1 = A2B2
18x = 72
x = 7218 = 4 cm