Answer:

Step-by-step explanation:
Given that,
The base of a triangle = 2 km
The perpendicular height of the triangle = 
We need to find the value of x. It is the Hypotenuse of the triangle. It can be solved as :

So, the value of x is equal to
.
5% = 5/100 = 1/20;
12% = 12/100 = 3/25;
15% = 15/100 = 3/20;
...............................
Answer: <em>1, i think :)</em>