The speed of the boat is 36 kmph higher than that of the stream in which it travels . if it can travel 828 km downstream in 18 hours and the same in upstream in 23 hours , its average speed is __________.(A) 36 kmph(B) 41 kmph(C) 46 kmph(D) 31 kmph.

hydsarema

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• Sep 28th, 2008

Here the average speed of the boat is 41initially let the speed of the stream be xthen  36+x=828/18=46therefore speed of stream is 10.while going upstream the speed of the boat will be reduced by 10 ...

mathu_228

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• Sep 25th, 2008

46 kmph    

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