Question

Your store is 130 ft x 60 ft. The security cameras you are planning to purchase each cover 400 sq ft. You want to cover the whole store. How many cameras do you need? (Round up.)

Answer 1

20 cameras.

Explanation:

We have been given the dimensions of a store as
`130\text{ ft}* 60\text{ ft}`. We are also told that each security camera covers 400 sq ft.

First of all, we will find the area of store by multiplying its dimension as:

`\text{Area of the store}=130\text{ ft}* 60\text{ ft}`

`\text{Area of the store}=7800\text{ ft}^2`

To find the number of camera it will need to cover the whole store, we will divide the total area of store by the area covered by each camera.

`\text{Cameras required to cover the whole store}=\frac{7800\text{ ft}^2}{400\text{ ft}^2}`\

`\text{Cameras required to cover the whole store}=(78)/(4)`

`\text{Cameras required to cover the whole store}=19.5`

Since we can not purchase 0.5 of a camera, so we will round up our answer.

`\text{Cameras required to cover the whole store}=20`

Therefore, we need 20 cameras to cover the whole store.

Answer 2

`20\ cameras`

Explanation:

step 1

Find the total area of the store

`A=130*60=7,800\ ft^(2)`

step 2

Divide the total area of the store by the area that cover one camera

`(7.800)/(400) =19.5\ cameras`

Round up

`19.5=20\ cameras`