Melting Snowball

Calculus Level 2

Assume that a snowball melts in such a way that its volume decreases at a rate proportional to its surface area. If half the original snowball has melted away after 2 hours, how many more hours will it take for the snowball to disappear completely?

Warning:
1. Enter your answer in hours
2. Round your answer to 2 decimal places to receive full credit