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Problem P. 3815. (September 2005)

P. 3815. A car travels at a speed of 12 km/h towards south for five minutes, then it turns toward east and moves at a speed of 25 m/s for 3 minutes, and finally it changes its velocity to 108 km/h and travels toward north-east for two minutes. Calculate the length of its displacement and the average speed.

(3 pont)

Deadline expired on October 11, 2005.


Statistics:

450 students sent a solution.
3 points:261 students.
2 points:98 students.
1 point:65 students.
0 point:19 students.
Unfair, not evaluated:7 solutions.

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