Question

A fire sprinkler sprays water over the area of a circle with a diameter measuring 7 feet About how many square feet does the fire sprinkler cover?

Answer 1

38.5

Explanation:

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Answer 2

Answer:
`38.465\text{ ft}^2`

Explanation:

Given: A fire sprinkler sprays water over the area of a circle with a diameter measuring 7 feet.

Then the radius of the circle :
`(d)/(2)=(7)/(2)=3.5\ feet`

The area of a circle is given by ;-

`\text{Area of circle}=\pi r^2`, where r is the radius of the circle.

`\text{Area of circle}=(3.14) (3.5)^2=38.465\text{ ft}^2`

Hence, the fire sprinkler covers
`38.465\text{ ft}^2` of the area.