a streamer goes downstream from one point to another in 20 hours.while going upstream it covers the same distance in 32 hours.if the speed of stream is 6km/h,then find the speed of the streamer in still water and distance between the points.
pls give explanitation
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Let speed of the streamer in still water= x km/hr
Speed of downstream =(x+2)km/hr
Distance between the ports =4(x+2)km.... (i)
Speed of upstream =(x-2)km/hr
Distance between the ports =5(x−2)km....(ii)
from Equation (i) and (ii)
4(x+2)=5(x−2)
4x+8=5x−10
x=18
∴ Distance between two ports =4(x+2)
=4(18+2)km=80 km
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