hey ur brain test...... The diameters of two circles with Centre A and B are 16 cm and 13 cm respectively ,if the area of circle with Centre C is equal to the sum of areas of other two circles. Then find the circumference of the circle with Centre c.
Anonymous:
64.73cm
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Heya!!!
Let the radius of Circle having centre c is = r
It's perimeter is = 2πr
Area of circle having centre A = π ( 8 )²
Area of circle having centre B = π ( 6.5 )²
And
Area of circle having centre C = π r²
According to the question
π r² = π ( 64 + 42.25 )
r² = 106.25
r = 10.38cm
Therefore circumference of circle having centre C is = 2 π ( 10.38 ) = 65.187cm
Have a nice time.
Let the radius of Circle having centre c is = r
It's perimeter is = 2πr
Area of circle having centre A = π ( 8 )²
Area of circle having centre B = π ( 6.5 )²
And
Area of circle having centre C = π r²
According to the question
π r² = π ( 64 + 42.25 )
r² = 106.25
r = 10.38cm
Therefore circumference of circle having centre C is = 2 π ( 10.38 ) = 65.187cm
Have a nice time.
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