Question

If the difference between the circumference and radius of a circle is 37 cm, then using π = $\frac{22}{7}$, the circumference (in cm) of the circle is

(a) 154

(b) 44

(c) 14

(d) 7

Answer 1

We know that circumference; C of the circle with radius r is equal to.

We have given difference between circumference and radius of the circle that is 37 cm.

Substituting we get,

Dividing both sides of the equation by, we get,

Therefore, circumference of the circle will be
$$\begin{gathered} 2\mathrm{\pi r}=2\times \frac{22}{7}\times 7 \\ =44{\mathrm{cm}}^2 \end{gathered}$$

Hence, the correct choice is (b).