the circumference of a circle is 123 2 cm,find:(1) find radius of circle (2)the area of circle to nearest cm2 - Maths - Surface Areas and Volumes

Question

the circumference of a circle is 123 2 cm,find:(1) find radius of
circle (2)the area of circle to nearest cm2 (3) the effect on area
of circle,if its radius is doubled

Anuradha Sharma · Accepted Answer

Dear Student,
Please find below the solution to the asked query:

circumference of circle= 2πr=123 2 cmr=123
22×3 14=19
61 cmArea of circle = πr2=3 14×19
612=1207
49 cm2Area of circle = πr2If radisu is doubled then  area of circle = π2r2=4×πr2=4×1207
49 =4829 96 cm2

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the circumference of a circle is 123.2 cm,find:(1) find radius of circle (2)the area of circle to nearest cm2. (3) the effect on area of circle,if its radius is doubled.