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?
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 = ??
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.
how many packages of ribbon will sarah buy?
I definitely know the answer to that one, luis. It's probably around 58,007,450 packages of ribbon.
To find the number of posts, we need to calculate the perimeter of the rectangle and then divide it by the distance between each post.
First, let's calculate the perimeter of the rectangle using the formula:
Perimeter = 2 * (Length + Width)
Given that the length of the rectangle is 30 feet and the width is 20 feet, we can plug these values into the formula:
Perimeter = 2 * (30 + 20) = 2 * 50 = 100 feet
Now, we need to determine the number of posts by dividing the perimeter by the distance between each post. Since the distance between each post is 2 feet, we can calculate the number of posts as:
Number of posts = Perimeter / Distance between each post
Number of posts = 100 / 2 = 50
Therefore, there will be 50 posts in total.