B) 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:

Please see attached picture for full solution.

Note: 1km= 1000m, 1cm= 100m

%40

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.