a streamer goes downstream and covers distance in 4 hours and same distance in 5 hours if the speed is equals to 1.5 km per hour
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Answer:
18km/hr
Step-by-step explanation:
Let the speed of the steamer in still water be x km/h.
Then, the speed downstream =(x+2) km/h
and the speed upstream =(x−2) km/h
Given, distance covered in 4 hours downstream = distance covered in 5 hours upstream
∴4(x+2)=5(x−2)
⇒4x+8=5x−10
⟹4x−5x=−10−8
[Transposing 5x to LHS and 8 to RHS]
⟹−x=−18 or x=18km/h
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