Question

A STORY OF UNITS

Lesson 23 Problem Set


3.7


Mischa makes a 4 foot by 6 foot rectangular banner. She puts ribbon around the outside edges. The


ribbon costs $2 per foot. What is the total cost of the ribbon?


к


W


What I know-


What I want to know-


Is there a Special condition?


Type here each banner is 4 by Type here how much it will cos Type here- $2 per ft


6 ft and its $2 per ft


for two


The ribbon will cost $ _40_


Math is


AWESOME!

Answer 1

$40 will be the total cost of the ribbon.

Explanation:

To find the cost of ribbon to be put on the edges of rectangular banner, we need to:

1. Find the perimeter of the rectangle.

2. Multiply the perimeter with the per foot cost to find the total cost.

Let us find the perimeter first:

Perimeter of a rectangle is given as:

`P = 2 * \text{(length+width)}`

Here, the dimensions of rectangle are 4ft by 6ft.

So, perimeter =
`2 * (4+6) \Rightarrow 20\ ft`

It is given that per foot cost is $2.

Total cost of the ribbon =
`2 * 20 \Rightarrow $40`

$40 will be the total cost of the ribbon.