Question

A steamer goes downstream and covers the distance between two Point in 4 hours while it covers the same distance upstream in 6 hours. mathcal H the speed of 2km/ h , find the speed of steamer in still water.​

Answer 1

Answer:

18km/h

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

Answer 2

Answer:

10 km/h is the speed of the streamer in still water.

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 6 hours upstream

∴4(x+2)=6(x−2)

⇒4x+8=6x−12

⟹4x−6x=−12−8  

⟹−2x=−20 or

x=10 km/h