*) The scale on a map is 1 : 25000 How many kilometres on the ground is represented by 9 cm on the map?

2.25km

Step-by-step explanation:

a scale of 1 : 25000 means:

1 cm on map > equals 25000 cm on ground  

hence,

9 cm on map > equals 25000 x 9 cm = 225,000 cm = 2.25km on ground

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.