Sunday

April 19, 2015

April 19, 2015

Posted by **kaur** on Saturday, March 6, 2010 at 7:38am.

- maths -
**Anonymous**, Tuesday, January 20, 2015 at 7:26pmLet speed x

Speed= D/T

Speed of the boat in upstream= 24/18-x (equation 1)

Speed of boat in down stream= 24/18+x (equation 2)

(Equation 1-2)

24/18-x - 24/18+x= 1

24/18-x= 1+ 24/18+x=18+x+24/x+18=42+x / x+18

28/ x-18= 42+x/x+18

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