Math, asked by saptaparnasahu0001, 2 months ago

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​

Answers

Answered by ruchikhanakmitpaoh4p
1

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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