Question

Sultan is building an open-ended (straight) fence by stringing wire between posts 25 metres apart.If the fence is 100 metres long, how many posts should be use?

Answer 1

The first post is at one end. The second is 25 m away. The third is 50 m away. The fourth is 75 m away. The last (and fifth) is at the other end, 100 m away.

Answer 2

Given,

The posts are 25 m away.

The fence is 100 m long.

To find,

The number of posts in building an open-ended fence.

Solution,

5 posts should be used in a 100 m long open-ended fence.

We can easily solve this problem by following the given steps.

Now,

It is given that the distance between two posts is 25 m.

So, the first post will be at the first end of the fence, the second post will be 25 m away, the third post will be 50 m away, the fourth post will be 75 m away and the fifth post will be 100 m away from the starting point.

Hence, the number of posts will be 5.

(Another way to solve this problem is to divide 100 by 25 and add 1 to its answer as one post is to be at the starting point.)