Question

The area of a circle is 78.5 sq.cm. Calculate the circumference of the circle [Taken π=3.14].

Answer 1

Step-by-step explanation:

πr2= 78.5

$78.5 \\ {r}^{2} = 78.5 \div 3.14 \\ {r }^{2} = 25 \\ r = \sqrt{25} \\ r = 5 \\ \ \pi \times r \times 2 = 3.14 \times 5 \times 2 \\ = 31.4$