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 one-fourth 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?
Deadline expired on 11 May 2006.
|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.|