P. 3784. In each of two big tanks there is 100 l of water of a temperature of 10 oC in one and 30 oC in the other. From the warmer tank we pour 1 l of water into the colder one. After blending we pour 1 l of water back. How many times are we to repeat this process to reach at least 5 oC temperature change in both tanks? (Neglect losses.)
Deadline expired on 11 April 2005.