the area of a circle is 154 cm2 find its circumference, Area, General Mathematics

Question:The area of a circle is 154 `cm^2`. Find its circumference.

Answer `π R^2 = 154 => 22/7 xx R^2`

`= 154 or R^2 = (154 xx 7/22)`

`= 7^2`

So, R = 7 cm.

:. Circumference` = 2 πR = (2 xx 22/7 xx 7) cm`

           `= 44 cm.`

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The area of a circle is 154 `cm^2`. Find its circumference.

Question:The area of a circle is 154 `cm^2`. Find its circumference.

Answer `π R^2 = 154 => 22/7 xx R^2` `= 154 or R^2 = (154 xx 7/22)` `= 7^2` So, R = 7 cm. :. Circumference` = 2 πR = (2 xx 22/7 xx 7) cm` `= 44 cm.`