Barbie Bungee Date Estimate

If I had about two meters drop of distance with 8 rubber bands, I think that the distance that the Barbie will reach with 10 rubber bands will be around 250 cm, if by each drop the distance would be 25 cm. Using that same pattern, if I had 20 rubber bands, the distance would be around 500 cm, which will be at least 5 meters. And probably the same process will follow with 30 rubber bands, there would be an estimate of around 750 cm, about 7.5 meters in total. This is because if for each rubber band there was a drop of 25 meters, and 25 times 30 would be 750 cm.