Question

takes 1 hour more to go upstream then to return to downstream to the same spot is speed of motor boat in still water is 18 km per hour in still water what is speed of stream​
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Answer 1

Answer:

speed of stream. 6km/hr

Step-by-step explanation:

up stream speed =u

down stream speed= v

speed in still water =18km/hr

speed of water =x

u=18-x

v=18+x

time for upstream=t+1

time for downstream=t

distance covered d.

(18-x)×(t+1)=(18+x)×(t)

18t-xt+18-x=18t+xt

suppose time t=1hr.

18-x+18-x=18+x

3x=18

x=6km/hr

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