Answer:
The answer is 125.
We are given the equation:
..........(1)
Now we have to write it in quadratic form using substitution.
The general form of quadratic equation is given by:

So let us say
.......(2)
Plugging the value of (x-5)² from equation (2) in (1),

Answer : Option B. 
Answer:
14km
Explanation
11km + 11km = 22km is the sum of both the width.
If you want to find the length than minus the perimeter with 22.
50km - 22km = 28km is the sum of both the length.
To know only one side of the length, divide it by 2.
28km/2 = 14km is the length
Option 2 - a + bc / a - bc