Question

A motor boat whose speed is 18km/h in still water. It takes 1 hour more too go 24km upstream than to return downstream to the same spot. Find the speed of the stream.​

Answer 1

Answer:

Answer: The speed of the stream is 6 km/hr.

Given that, the speed boat in still water is 18 km/hr. As speed to stream can never be negative, we consider the speed of the stream (x) as 6 km/hr.

Step-by-step explanation:

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Answer 2

Answer:

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• A motorboat whose speed is 10km/h in still water .It takes 1 hour more to go 24km upstream than to return downstream to the same spot.Find the speed of the stream.

Answer :-

• x=-54 or x=6.

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• Here we use formula is

$\frac{distance \: covered \: upstream}{speed \: of \: boat} = \frac{distance \: covered \: by \: downstream}{speed \: of \: boat \: down \: strea} + 1hr$

• According to this formula we apply the values to get perfect answer.

• So,

• $= \frac{24km}{(18 - x)km \: per \: hr} = \frac{24}{(18 + x)km \: per \: hr} + 1hr$

• $= \frac{24}{18 - x} = \frac{24}{18 + x} = 1$

• $= \frac{432 + 24x - 432 + 24x}{(18 + x)(18 - x)}$

• ${x}^{2} + 54x - 6x - 324 = 0$

• $x(x + 54) - 6(x + 54) = 0$

• (x-6) or (x+54)

• x=+6 or x=-54.

Hope it helps u @Aaaryaa.

Thank you .