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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?

(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.

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