Math, asked by kdjjana, 10 months ago

A fence has to be made. Posts are to be for every 6 m interval. They are at starting and ending point. Person brings some
posts and there are 7 posts lacking. If they are 9 m interval the posts are sufficient. How many posts did the persons
bring?​

Answers

Answered by VineetaGara
2

Answer:

The person bring total (126/6-6) posts

that is (21-6)=15 posts.

Step-by-step explanation:

To make the fence the person bring some posts and let assume that the length of the fence is L m across.

If the posts are at 6 m interval then the number of posts will be L/6

Given that the posts are at last and first position. So the number of posts are (L/6+1)

The person noticed that 7 posts are lacking to make the fence.

Now the number of posts is {(L/6+1)-7}

If the interval of posts is 9 m then the posts are sufficient to make the fence.

So required posts are (L/9+1)

∴ {(L/6+1)-7}=(L/9+1)

=>(L/6-6)=(L/9+1)

=>(L/6-L/9)=7

=>(3L-2L)/18=7

=>L=7x18

=>L=126 m

The person bring total (126/6-6) posts

that is (21-6)=15 posts.

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