Question
A boat can travel 270 km downstream in 9 hours and 63 km
upstream in 14 hours. Find the speed of the current.Solution
ATQ, Let 'x' be the speed of the boat in still water and 'y' the speed of the current. 
On solving: 2x=34.5⇒x=17.25 km/hr Substitute back to find 'y': 30−17.25=y=12.75 km/hr Speed of the current = 12.75 km/hr
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