Question
A boat covers 24km upstream and 36km downstream in 6
hours while it covers 36km upstream and 24km downstream in 13/2 hours. The speed of the Boat is.ÂSolution
Let the speed of boat in still water =B and speed of stream =S ATQ-  In these types of questions, make factor of 24 and 36 and choose the common values which satisfy the above equations. 24=2,3,4,6,8,12 36=3,4,6,9,12,18 Choose the greatest common factor. Put this value in equation (1)
 In these types of questions, make factor of 24 and 36 and choose the common values which satisfy the above equations. 24=2,3,4,6,8,12 36=3,4,6,9,12,18 Choose the greatest common factor. Put this value in equation (1)  B-S=8 B+S=12 B=10, S=2 Speed of Boat=10km/h.
 B-S=8 B+S=12 B=10, S=2 Speed of Boat=10km/h.
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