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A piece of wire in the form of a rectangle 18 cm long and 15 cm wide is bent and reshaped as a circle. Find the radius of a circle.
Question
A piece of wire in the form of a rectangle 18 cm long and 15 cm wide is bent and reshaped as a circle. Find the radius of a circle.
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Mathematics
6 months
2021-07-19T09:13:59+00:00
2021-07-19T09:13:59+00:00 1 Answers
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Answer:
r = 12.89
Step-by-step explanation:
18(2) + 15(3) = 81 = C
C = 2πr
81 = 2πr
81/2 = πr
r = 81/2π ≈ 12.89