Question

The distance between two nearby points on the boundary of the rectangle given is 1 unit. What is its perimeter?

Answer 1

There are 10 points along the length, so the length of the red rectangle = 9 units
There are 7 points along the breadth, so the breadth of the red rectangle = 6 units

So, the perimeter of the red rectangle = 9 + 6 + 9 + 6
= 30 units.