A plot of land doubles in size by adding x meters to the length and x meters to the width of the land.
If the original plot had an area of 200 by 300 meters, what is the value of x?

Question

A plot of land doubles in size by adding x meters to the length and x meters to the width of the land. 
If the original plot had an area of 200 by 300 meters, what is the value of x?

anonymous · Answer

We are given the original length and width of the plot of land, and we can compute the area with ease. Now, if we add x meters to both the length and width, we are told the area doubles. Hence, 
    (200+x)*(300+x) = 2*(200)*(300)  [Twice the original Area]

anonymous · Answer

What would x be?