lay39 lay39
  • 28-06-2017
  • Mathematics
contestada

Find the circumference of circle if the area is 300 square centimeters

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RickyChen
RickyChen RickyChen
  • 28-06-2017
pi*r^2 = 300

r = √(300/pi)

So circumference = 2*pi*r = 2√(300pi)
Answer Link
BrainIess
BrainIess BrainIess
  • 28-06-2017
Area of circle
πr² = 300 cm²
r = √(300/π)
r = 9.77205 cm
r ≈ 9.77cm (3s.f.)

Circumference of circle
= 2πr
= 2π(9.77205)
= 61.39960
≈ 61.4 cm (3s.f.)
Answer Link

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