Question:The are of a circle is 38.5 sq.cm. Its circumference is : 

A `6.2 cm` 
B `11 cm` 
C `22 cm` 
D `121 cm` 

+ Answer
C 

+ Explanation
`r^2 = 38.5 =>r^2`

`= (38.5 xx 7/22)`

`= (7/2)^2 or r = 7/2`

:. Circumference

`= 2 r = (2 xx 22/7 xx 7/2) cm`

`= 22 cm.`

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Irin Moni

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