A rectangular section 20 meters long and 5 meters wide less than the length was surrounded

A rectangular section 20 meters long and 5 meters wide less than the length was surrounded by a fence with pillars in which they are located at a distance of 5 meters from each other. how many pillars?

We know the length. We can find the width.

20 – 5 = 15 meters width of the site.

Now we find the perimeter of the lot, knowing from the rule that the perimeter is the sum of the length and width multiplied by 2.

P = (20 + 15) * 2 = 70 meters perimeter of the plot.

We find how many pillars we need, for this we divide the perimeter by 5.

70: 5 = 14 pillars are needed for the fence.

Answer: you need 14 pillars.