Question

A steamer travels 90 km downstream in the same time as it takee to travels 60 km upstream . if the speed of the steam is 5 km/h . find the speed of the water in still water​

Answer 1

Step-by-step explanation:

Let the speed of the streamer =xkm/h

The speed downstream =(x+5)km/h and

The speed upstream =(x−5)km/h

According to the given problem ,

x+5

90

=

x−5

60

On cross multiplication , we get ,

90(x−5)=60(x+5)

90x−450=60x+300

90x−60x=300+450

We get,

30x=750

x=

30

750

x=25

Therefore , the speed of the streamer in still water is 25km/h

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