SOLUTION: Find the approximate circumference (in centimeters) and area (in square centimeters) of a circle whose diameter has length 60 cm. Use 𝜋 ≈ 3.14

Algebra ->  Formulas -> SOLUTION: Find the approximate circumference (in centimeters) and area (in square centimeters) of a circle whose diameter has length 60 cm. Use 𝜋 ≈ 3.14      Log On


   

Question 1194228: Find the approximate circumference (in centimeters) and area (in square centimeters) of a circle whose diameter has length 60 cm. Use 𝜋 ≈ 3.14
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Diameter of 60 inches means radius is 30 inches.

r for radius
C circumference
A area,
2pi%2Ar=C

and

pi%2Ar%5E2=A

you have been given already 2r=60.
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Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

Since the diameter is 60 cm (given), it implies that the radius is r = 30 cm.


Now use the formulas


    circumference = 2%2Api%2Ar = 2*3.14*30  cm;


    area = pi%2Ar%5E2 = 3.14%2A30%5E2  cm^2.

Happy calculations (!)