P. 4436. A tour boat departed at Siófok travelled at a constant speed of 18 km/h, first moved towards the North for a quarter of an hour, then it turned and travelled another quarter of an hour towards the West, then again turned and travelled a quarter of an hour towards the South, and then finally it travelled towards the East for a quarter of an hour.
a) Consider the curvature of the Earth and estimate how far will the tour boat be from the starting point at the end of the tour.
b) The mass of the boat is 500 tons. By what amount was the weight of the boat smaller when the boat travelled towards the East than when it travelled towards the West?
Deadline expired on 10 May 2012.