Question

The circumference of a circular field is 528 cm. Then its radius is __________.

• A. 42 cm
• B. 84 cm
• C. 72 cm
• D. 56 cm

Answer 1

The correct option is B

84 cm

The circumference of a circle with radius r is given by
$2\pi r.$

Hence,
$2\pi r=528$

$r=\frac{528}{2\pi }=84cm$

$(\pi =\frac{22}{7})$