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?
Deadline expired on 10 November 2014.
|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.|