Question

The 4 cities(A,B,C&D) are to be connected by roads.The budget allows 22 km of road to be build. How can it be done? In the given figure ABCD is a square with each side 8km.​

Answer 1

By constructing two diagonal roads.
`l \approx 22.627\,km`

Explanation:

The only feasible solution is the construction of two diagonal roads between each pair of cities. The total length is:

`l = 2\cdot √(2)\cdot (8\,km)`

`l \approx 22.627\,km`