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A Motor Boat Can Travel At 10 Km/h In Still Water. It Travelled 91 Km Downstream In A River And Then Returned, Taking Altogether 20 Hours. Find The Rate Of Flow Of The River? |
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Answer» GIVEN, speed of the Boat in still water (B) =10 km/hr Let S be the speed of flow of river, then 91/(10+S) + 91/(10-S) = 20, Then going by options 91/13 - 91/7 = 20 So, S = 3 km/hr. Given, speed of the Boat in still water (B) =10 km/hr Let S be the speed of flow of river, then 91/(10+S) + 91/(10-S) = 20, Then going by options 91/13 - 91/7 = 20 So, S = 3 km/hr. |
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