Question

A motor boat whose speed is 20 km/h in still water takes 2 hour more to go 34 km upstream than to return downstream to the same spot. Find the speed of the stream.

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Answer 1

Answer:

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Step-by-step explanation:

Speed of boat =18km/hr

Distance =24km

Let x be the speed of stream.

Let t1 and t2 be the time for upstream and downstream.

As we know that,

speed=timedistance

⇒time=speeddistance

For upstream,

Speed =(18−x)km/hr

Distance =24km

Time =t1

Therefore,

t1=18−x24

For downstream,

Speed =(18+x)km/hr

Distance =24km

Time =t2

Therefore,

t2=18+x24

Now according to the question-

t1=t2+1

18−x24=18+x24+1

⇒18−x1−

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