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A speedboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. What is the speed of the stream in km/hr? km/hr km/hr. Dec 27, �� Find the speed o "The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes. Given:Speed of boat in still water = 15 km/hrLet x be speed of the stream in km/hrSpeed of the boat upstream = 15?xSpeed of the boat down stream = 15+xTime taken for upstream T 1 = 15?x30 Time taken for downstream T 2 = 15+x30 Given, T 1 +T 2 = 29 = 15?x30 + 15+x30 = 29 = 30(15?x1 + 15+x1)= 29 = 30((15?x)(15+x)15+x?15?x)= 29 = ?x?30 = 29 = ?x = 21 ? ?x2 = ? x2 = 25? x = 5 . (? x is +ve)? x = 5 km/hrSpeed of the stream . Solution: Let the speed of the train be x km/h. Downstream speed = (15 + x) km/h. Upstream speed = (15 - x) km/h. Time taken to go 30 km upstream = 30/(15 - x) hrs. Time taken to go 30 km downstream = 30/(15 + x) hrs. According to the Question, ? 30/(15 - x) + 30/(15 + x) = 9/2. ? 30(15 + x) + 30(15 - x)/(15 + x) (15 - x) = 9/2. Answer:Given:Speed of boat in still water =15 km/hr Let x be speed of the stream in km/hrSpeed of the boat upstream =15?xSpeed of the boat down stream =15+xTim � Please solve quickly the speed of boat in still water is 15 km/hr. it takes one hour less while returning 20 km downstream than while going upstream to the same spot. find the speed of the stream. 1. See answer. cressidaleitao15 is waiting for your help. Add your answer and earn points. nehalpatel28 nehalpatel Answer: Given: Speed of boat in still water =15 km/hr. Let x be The Speed Of A Boat In Still Water Is 15 speed of the stream in km/hr. Speed of the boat upstream =15?x. Speed of the boat down stream =15+x. Time taken for upstream T. 1. = 15?x. Time taken for downstream T. 2. = 15+x. Given, T. "The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes. Find the speed.
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