what is the scale factor of 1 cm = 15 ml

Answer 1

This seems like a trick question.

Centimeters (cm) are a unit of length.

Milliliters (ml) are a unit of volume.

So I can not explain where the factor of 15 originates.

If length is the unit of measure. 1 cm = 10 mm

If volume is the unit of measure, 1 cc = 1ml.