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reginaldboyd28
24.07.2019 •
Mathematics
Acircular flower bed is 19 m in diameter and has a circular sidewalk around it that is 2 m wide. find the area of the sidewalk in square meters. use 3.14 for pi. the area of the sidewalk is m^2
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Ответ:
We want to find the area between the circles.
The equation for the area of the sidewalk is:
A = pi * (R ^ 2 - r ^ 2)
Where,
R: greater radio
r: minor radius
We have then:
R = 19/2 + 2
R = 11.5 m
On the other hand,
r = 19/2
r = 9.5 m
Substituting values we have:
A = 3.14 * ((11.5) ^ 2 - (9.5) ^ 2)
A = 131.88 m ^ 2
The area of the sidewalk in square meters is:
A = 131.88 m ^ 2
Ответ: