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A motorboat covers a certain distance down stream in a river in 5 hours. It covers thesame distance upstream in 5 1/2 hours. If the speed of the stream is 1.5 Kmph . Findthe speed of the boat. |
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Answer» Answer: Step-by-step EXPLANATION: LET the speed of boat be x Speed upstream = x-1.5 Speed downstream = x+1.5 Since the upstream and downstream DISTANCE is same. (x+1.5)5 = (x-1.5)5.5 5X + 1.5*5 = 5.5x - 1.5*5.5 5.5x - 5x = 1.5*5.5 + 1.5*5 0.5x = 1.5*10.5 x = 1.5*10.5/0.5 x = 3*10.5 = 30.5 Speed of boat = 30.5 km/hr |
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