Problem P. 3884. (April 2006)
P. 3884. There is a layer of oil on the surface of water and a wooden board is floating in it, such that half of its volume is submerged in the water and onefourth of its volume is in the oil. What is the density of the board if the density of oil is 70% of the density of water?
(3 pont)
Deadline expired on 11 May 2006.
Statistics:
155 students sent a solution.  
3 points:  119 students. 
2 points:  16 students. 
1 point:  4 students. 
0 point:  2 students. 
Unfair, not evaluated:  14 solutions. 
