Question

Find the diameter of a circle whose circumference is 308 cm

Answer 1

diameter = 98cm
circumference = 22/7 ×diameter
308 = 22/7 ×d
d = (308×7) /22

Answer 2

Diameter is 98 cm.

Step-by-step explanation:

Given:

circumference = 308 cm

⇒ 2πr= 308

⇒ $2\times \frac{22}{7} \times r = 308$            [π=$\frac{22}{7}$]

⇒ $r = \frac{308\times 7}{44}$

⇒ $r = \frac{2156}{44}$

⇒ r = 49 cm

Diameter= 2r = 2(49)=98 cm