For a boat to reach port B from port A, it has to
travel 80 km upstream and then 240 km downstream.
If the speed of the boat in still water is 45 km/h and
the speed of the stream is 5 km/h, then what is the
time taken by the boat to reach port B from port A?
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distance from a to b= upstream+ downstream
= 80km+240km
=300 km
total speed=speed of boat and stream
= 45+5(km/h)
=50km/h
time= D/S
=300/50
=6h
this is my answer
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