00:00This video is part of a Google Form quiz that teachers can assign to their students for homework.
00:06After the students submit their answers, then they can play a video like this one to see the
00:10answer explained. We've made more than 100 quizzes as Google Forms with free access videos,
00:17which teachers are welcome to copy for free. To get access to these, please see the link in the
00:22description. This video is based on a question from an actual state exam. You may have one like
00:28this on your state exam. If you've already done so, before watching this video, we suggest that you
00:34watch the video on how to calculate perimeters. Travis builds a fence around a rectangular garden
00:40that is 10 feet wide and 20 feet long. He puts fence posts 2 feet apart. How many fence posts
00:47does Travis put around his garden? It helps to draw a picture when solving word problems.
00:53Here's a rectangular garden. We're told it's 10 feet wide and 20 feet long.
00:58Since this is a rectangle, we know that the length of the short sides are equal to each other,
01:02so we'll write a 10 on this side too. Likewise, we know that the length of the long sides are equal
01:08to each other, so we'll write a 20 on this side too. To solve this problem, let's draw in the fence
01:14posts by using red X marks. We have to make them 2 feet apart. This side is 20 feet long. 20 divided by 2
01:21equals 10. So we'll draw in 10 fence posts for this side. This side is 10 feet long.
01:2810 divided by 2 equals 5. So we'll draw in 5 posts for this side.
01:34Now we'll count up the number of fence posts. It helps to write a number next to each fence post,
01:44so we don't accidentally skip some or count some posts more than once.
01:49There are 30 fence posts.
01:51There are 30 fence posts.
01:56Choice C is correct.
01:58Thanks for your attention.
02:00Thanks for your attention.
