These questions are based on the following information.
P and Q are two villagers on the bank of a river. Q is 24 km downstream of P. Veeru lives in P, while his friend Chiru lives in Q. Both have clocks at their houses but Veerus clock runs ahead of Chirus by a certain constant period. One day Veeru sets off at 5:00 p.m. (by his clock). The next morning, he sets off from Q at 6:00 p.m. (by his clock) and reaches Q at 6:00 p.m. (by Chirus clock). The next morning, he sets off from Q at 6:00 a.m. (by his own clock). The speed of the current in the river is 2 km/hr.
Find the speed (in km/hr) of the boat in still water.