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 November 10, 2014.
173 students sent a solution. 4 points: 150 students. 3 points: 9 students. 2 points: 2 students. 1 point: 12 students.