If the redius of circle f is 19 cm what is the length of its diameter

38 cm

Step-by-step explanation:

Given : radius = 19 cm

Radius of the circle is the distance from the centre of the circle straight to the circumference.

Diameter is the longest chord of the circle, which starts from one point straight passing through the centre to the other end of the circle.

And, Diameter = 2 × radius

= 2 × 19

= 38 cm

The diagram is attached for your reference.

my dear correct answer is option number 3