A river boat travels 15 km downstream in 3 hours...?

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15km/3h downsteam. 5km/h downsteam speed = speed of boat + speed of current
15km/5h upstream. 3 km/ h
downsteam speed = speed of boat - speed of current

x+y = 5
x-y =3
add 2 equations 2x = 8 , therefore x =4.
meaningi speed of boat in still water 4 km/h . plugging first equation give y 1km/h. that's rate of current.

a river boat travels 15 km downstream in 3 hours. return trip upstream takes 5 hours. find rate of river boat in still water , rate of current.

how solve word problem?
thank in advance:)


Science & Mathematics Mathematics Next



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