The area of a circle is 1386 cm². What is its circumference (in cm).

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16 Sep 2020 Area

The area of a circle is 1386 cm². What is its circumference (in cm).

OPtion

1) 300
2) 275
3) 270
4) 132
5) 245
6) 250
7) 280
8) 190
9) 155
10) None of these

Solution

Pi*r^2 = 1386
r^2 = 1386 * 7/22 = 441
r = 21

Circumference = 2*pi*r = 2*22/7 * 21 = 132

Correct Option: 4 Best Solution (0)