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BEGINNER'S BOX-11, , 1., , , , Aman can swim ata speed 2 m/sin still water. He starts swimming in a river at, of water flow and reaches the directly opposite point on the opposite bank, , , , (a) Find the speed of flowing water., , (b) If width of river is 1 km then calculate the time taken to cross the river., , , , 2 km wide river flowing at the rate of 5 km/hr. A man can swim in st, to cross the river along the shortest path. Find —, , (a) in which direction should the person swim., , (b) crossing time., , A child runs to and fro with a speed 9 km/h (with respect to the belt) on a long horizontal, (fig.) between his father and mother located 50 m apart on the moving belt. The belt m, of 4 km/h. For an observer on stationary platform outside, what is the, , (a) speed of the child while running in the direction of motion of the belt?, (6) speed of the child while running opposite to the direction of motion of, (c) time taken by the child in (a) and (b)?, , Which of the answers will alter if motion is viewed by one of the parents?, , , , , , Moving belt — 4kmh, Stationary, observer, E27,, , Qremeeramemnarea SEED LT)