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Problem P. 4661. (October 2014)

P. 4661. A car and a lorry moves along two straight perpendicular roads towards the cross-roads. The speed of the lorry with respect to the car is 90 km/h. The speedometer of the car reads 72 km/h. At the instant when the speeds were measured the lorry was 600 m and the car was 800 m from the cross-roads. Which vehicle reaches the cross-roads sooner, if both move uniformly?

(4 pont)

Deadline expired on 10 November 2014.


Statistics:

175 students sent a solution.
4 points:150 students.
3 points:9 students.
2 points:2 students.
1 point:12 students.
Unfair, not evaluated:2 solutions.

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