A boat goes 16 km upstream and 24 km downstream in 6 hr. Also it cover 12 km upstream and 36 km downstream in same time. Find the speed of the boat in still water and that of the stream
In the given figure if ab is the diameter of a circle with Centre O and QC is a tangent to the circle at C if angle C A B equal to 30 degree then find angle CQA and angle CBA