Question

You have an above ground pool that is 20 feet in diameter. One bag of sand does three square feet. How many bags of sand do you need?

Answer 1

Answer: Number of sand bags are 105

Explanation:

Alright, lets get started.

The diameter of pool is given as :
`20 \ \text{feet}`

The radius of pool will be :
`r=(20)/(2)=10`

So the area of the pool will be:

Area =
`\pi r^2`

Area =
`\pi *10^2`

Area =
`100 \pi`

Area =
`314.16`

3 square feet is covered by 1 sand bag, so

314.16 square feet will be covered by :
`(314.16)/(3)`

So, no of sand bag =
`104.7`

Rounding off to nearest number

Number of sand bags are 105 : Answer

Hope it will help :)