A boat travels in upstream. If the speed of boat in upstream is decreased by 50% then it is equal to the speed of current and speed of boat in still water is given as 240 km/hr. Then find upstream speed of boat? (in km/hr)
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Answer: 165 km/h
Step-by-step explanation:
speed of boat in still water=240km/h
speed of stream =x
speed of upstream =(240-x)km/h
given x=50%of(240-x)
x=50(240-x)÷100
100x=12000-60x
160x=12000
x=75
upstream speed =(240-75)km/h
upstream speed=165km/h
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