Problem P. 4661. (October 2014)
P. 4661. A car and a lorry moves along two straight perpendicular roads towards the crossroads. 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 crossroads. Which vehicle reaches the crossroads 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. 
