C and D start cycling from their fitness club. C rides 1 km West, then turns to his left and rides 5 km. In the meanwhile D rides 3 km South, then turns West and rides 7 km, then turns to his left and rides 2 km. Where is C with respect to D?
According to a latest report by UN Women and the UN Development Programme (UNDP), released in November 2017, which region has been ranked as the world's most violent region for women?
Out of three pipes the first two can fill an empty tank in 9 and 18 hours, respectively while the third can drain the filled tank in 15 hours. If all the three pipes are opened when the tank is empty, after how many hours will the tank be full?