Question

Question 20

Circumference of a circular disc is 88 cm. Its radius is

(a) 8 cm
(b) 11 cm
(c) 14 cm
(d) 44 cm

Answer 1

We know that, circumference = $2\pi r$
$\Rightarrow 88=2\times \frac{22}{7}\times r\Rightarrow r=\frac{88\times 7}{2\times 22}[\because circumference=88cm,given]$
$\Rightarrow r=14cm$
Hence, the radius is 14 cm.