Question

the area of a circle is 770 cm^2 ,then find its circumference

Answer 1

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Answer 2

The area of a circle is 770 cm^2 ,then its circumference is 98.34 cm

Solution:

Given that area of circle is 770 $cm^2$

We need to find the circumference

The formula for area of circle is given as:

$area of circle = \pi \times r^2$

Where "r" is the radius of the circle

$770 = 3.14 \times r^2\\\\r^2 = \frac{770}{3.14}\\\\r = 15.66$

The circumference of circle is given as:

$circumference = 2 \pi \times r\\\\= 2 \times 3.14 \times 15.66\\\\= 98.34$

Hence circumference of circle = 98.34 cm

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