1. The problem statement, all variables and given/known data A 'supa-ball' is dropped from a height of 1 metre onto a level table. It always rises to a height equal to 0.9 of the height from which it was dropped. How far does it travel in total until it stops bouncing? 2. Relevant equations 3. The attempt at a solution The consecutive heights which the ball attains form a geometric series with first term a=1 and common ratio 0.9. Using the formula for the sum to infinity of the series, I am left with S = a/(1-r) = 1/0.1 = 10 metres However, the answer given is 19 metres. I don't understand how to get to this answer, is this just a typo?