Question

about 10 cm, shorter than 20 cm, longer than 20 cm, about 20 cm

Explanation:

Step1: Observe the length of the object

The purple - part is about 10 cm. The orange part is clearly longer than the purple part. But it is not extremely long.

Step2: Compare with 20 cm

Since the purple part is 10 cm and the orange part is more than 10 cm but not double or much more, it is shorter than 20 cm.

Answer:

Shorter than 20 cm