Problem P. 3834. (November 2005)
P. 3834. Electric toothbrushes are becoming more and more popular. Calculate the cost of operating one during a year if it dissipates a power of 2 W, and each day you spend 4 minutes cleaning your teeth. The price of 1 kWh electric energy is 34 forints.
(3 pont)
Deadline expired on December 12, 2005.
Statistics:
345 students sent a solution. 3 points: 302 students. 2 points: 13 students. 1 point: 21 students. 0 point: 1 student. Unfair, not evaluated: 8 solutionss.
Problems in Physics of KöMaL, November 2005