The area of the bottom of a circular pool 452.2 ft2. What is its circumference, rounded to the nearest tenth?
1 answer:
The area of a circle is given by A=Pi*r^2, and its perimeter, P=2*Pi*r.
To get the radius r, you must divide 452.2 by Pi, and then calculate the square root of this quotient.
To get the circumference or perimeter, use the radius in the formula P=2*Pi*r.
Finally, round the number you get to the nearest tenth.
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Lcm= 2
Because
2/2= 1
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2/10=5
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Radius (r) = ½ * diameter
½ * 10 = 5
A= pi * 5^2
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10.99 / 78.54 = about 14 cents per sq in (13.99)
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