stonecold wrote:
Excluding stoppages, the speed of a bus is 54km/hr and including stoppage, it is 45km/hr.For how many minutes does the bus stop per hour?
(A) 9
(B) 10
(C) 12
(D) 15
(E) 20
Simple shortcut formula for approaching this question will be : Difference of speed / Speed without stoppage = 9/45*60 = 10, Answer must be (B)
