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A steamer goes downstream from one …

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A steamer goes downstream from one port to another in 9 hrs . If covers the same distance upstream in 10 hrs . If the speed of the stream be 1 km per hrs, find the speed of the steamer in still water and the distance between the ports
  • 1 answers

Khushbu Kumawat 6 years, 7 months ago

Let the speed of the steamer in still water be {tex}x \; km/hour{/tex} 

so the speed in condition of down stream ={tex}x+1\; km/hour{/tex}

and speed in condition of upstream={tex}x-1\; km/hour{/tex}

we know that {tex}speed= {distance\over time}{/tex}

distance = speed Xtime

In first condition and second Distance is equal so

{tex}(x+1)\times9=(x-1)\times10{/tex}

{tex}\implies 9x+9=10x-10{/tex}

{tex}\implies x=19 km/hour{/tex}

speed of the steamer in still water{tex}=19 km/hour{/tex}

and Distance={tex}(19+1)\times9=180km{/tex}

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