Let the speed of boat in still water be a km/hr and that of stream be b km/hr. Therefore, 30/(a + b)= 3 ⇒ a + b = 10 ………..(i) 30/(a – b)= 5 ⇒ a + b = 6 ………..(ii) On adding, eq (i) and (ii) ⇒ 2a = 16 km/hr ⇒ a = 8 km/hr
Who among the following person stays on flat no. 2 of floor no. 5?
How many persons live between L and Y?
Who among the following person is living on floor number three?
Who among the following live immediate below O?
Five persons S, T, U, V and W have different weights. T is the lightest person. U is heavier than V but lighter than W. S is lighter than V. Who among t...
What is the direction of A’s flat with respect to D’s flat?
Who among the following belongs to Delhi?
If S and the person who have Yellow interchange their visiting days then how many persons likes after the person who have red colour?
Who is/are live(s) west of R?
Who among the following person visits immediately after X?
