3rd grade math

posted by .

A rectangle measures 30 feet by 20 feet and has a post at each corner. If posts are placed 2 feet apart. How many posts will there be in all?

  • 3rd grade math -

    I would have to find a piece of graph paper and draw it out for myself! But let me see if this is right:

    All totaled, there would be 100 feet of fencing, so it seems there would be 50 posts. BUT 4 of those posts (the corner posts) would be counted twice, right?

    So is this right?

    30+30+20+20 = 100
    100/2 = 50
    50 - 4 = ??

  • 3rd grade math -

    If you start at one corner, it is 100 feet around, so each 2 feet place a post, or 50 posts.

    To visualize this, sketch a 20x30 rectange, and place a post every 10 feet. Count the posts. You get 100/10=10 posts.

  • 3rd grade math -

    how many packages of ribbon will sarah buy?

  • 3rd grade math -

    I definitely know the answer to that one, luis. It's probably around 58,007,450 packages of ribbon.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 6th grade math

    You are putting up a 60 foot long fence in your backyard. According to the manufacturer's instructions, the fence posts should be equally spaced along the length of the yard. List all the possible spacing options if the amount of space …
  2. 4th grade

    bertrand is building in the form of a rectangle. he knows that the garden will be 10 feet wide. he wants to fence in the garden but only has 56 feet of fence to work with. how long mist the garden be to fence it with exactly 56 feet …
  3. geometry

    a rectangle measures 30 feet by 20 feet and has a post at each corner and a post every 2ft. How many posts in all?
  4. math

    A rectangle measures 30 feet by 20 feet and has a post at each corner. If posts are placed 2 feet apart. How many posts will there be in all?
  5. math

    A rectangle measures 30 feet by 20 feet and has a post at each corner. If posts are placed 2 feet apart. How many posts will there be in all?
  6. math VERY URGENT+IMPORTANT

    Farmer McDonald is building a fence. He will place posts six feet apart and stretch the wire fencing between the posts. If his pasture is thirty-six feet long and twelve feet across, how many posts will he need?
  7. math

    Jim is putting up fence posts around a rectangular garden. He used 50 posts and placed them 2 feet apart. The length of the garden is 30 feet. What is the perimeter of the garden?
  8. Math

    Jeff is putting a fence around his rectangular yard. It is 50 feet long and 30 feet wide. The fence posts must be 10 feet apart. How many posts does he need?
  9. Algebra

    A fence needs to be built around a field that is 100 feet long and 50 feet wide. A fence post will be placed in each corner of the field, and fence posts will be placed 10 feet apart around the entire field. Three fasteners are required …
  10. math, please help

    home work help al's garden is 18 feet long and 30 feet wide , he wants to put fence posts the same distance apart along all sides of the garden , what is the greatest distance apart he can place the fence posts

More Similar Questions