Answer:
Let boat speed=x
stream speed=y=2kmper hour
downstream time =t1=4hours
upstream time=t2=6hours
t1+t2xy
t2-t1
10x2
2
boat speed =10km /hr
distance =10x4=40 km
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Answer:
Let boat speed=x
stream speed=y=2kmper hour
downstream time =t1=4hours
upstream time=t2=6hours
t1+t2xy
t2-t1
10x2
2
boat speed =10km /hr
distance =10x4=40 km