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Question
Find the circumference and area of circle of radius 4.2 cm
Solution
Radius (r) = 4.2 cm
Circumference = 2 × r
`= 2xx22/7xx4.2`
`= (44/10xx 6) = 264/10`
= 26.4 𝑐𝑚
`Area = pir^2 = 22/7xx4.2xx4.2`
`=(22xx6xx42)/(10xx10)`
`=5544/100`
`55.44cm^2`
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