a Boat goes some distance in upstream in 6 hours and cover the same distance in the downstream in 4 hours.If the speed of stream in 3 km
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Let distance travelled be x km and speed of boat be y km/hr
Distance = speed * time
speed upstream = speed of boat - speed of stream
speed downstream = speed of boat + speed of stream
ATQ :
I condition : x =( y-3) * 6 ------(1)
II condition : x = (y+3) * 4 ------(2)
From (1) and (2)
(y-3) * 6 = (y +3) * 4
=> 6y - 18 = 4y + 12
=> 2y = 30
=> y=15 km
x= (y-3)*6
=> x = 72 km/ hr
Distance = speed * time
speed upstream = speed of boat - speed of stream
speed downstream = speed of boat + speed of stream
ATQ :
I condition : x =( y-3) * 6 ------(1)
II condition : x = (y+3) * 4 ------(2)
From (1) and (2)
(y-3) * 6 = (y +3) * 4
=> 6y - 18 = 4y + 12
=> 2y = 30
=> y=15 km
x= (y-3)*6
=> x = 72 km/ hr
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