# A boat covers 18 km downstream in 3 hours . If speed of current is 33 (1)/(3)% of its downstream speed . In what time will it cover a distance of 50

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A boat covers 18 km downstream in 3 hours . If speed of current is 33 (1)/(3)% of its downstream speed . In what time will it cover a distance of 50 km upstream ?
A. 50 hour
B. 40 hour
C. 30 hour
D. 25 hour

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According to question ,
Downstream speed = (18)/(3) = 6 km/hr
or x + y = 6 (when x to speed of boat in still water ,
y to speed of current )
Speed of current = (1)/(3) xx 6 = 2 km/hr
Speed of boat in still water = 4 km/hr
Required time = (50)/((4-2)) = 25 hour