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Shkiper50 [21]
4 years ago
7

4) Expression: 360 What is the value?

Mathematics
1 answer:
myrzilka [38]4 years ago
8 0

The value of \sqrt{360} is 18.974.

Solution:

Given expression:

\sqrt{360}

To simplify the given expression and find the value.

\sqrt{360}

Factor the value 360 = 36 × 10.

\sqrt{360}=\sqrt{36\times 10}

36 can be written as 6 × 6 = 6²

10 can be written as 2 × 5.

       =\sqrt{6^2\times 2\times 5}

      =6\sqrt{2\times 5}

      =6\sqrt{10}

      = 18.974

The value of \sqrt{360} is 18.974.

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Recall your d = rt, distance = rate * time.

b = speed rate of the boat.

c = speed rate of the current.


keeping in mind that, as the boat goes Upstream, against the current, it's speed is not "b", but is really " b - c ", because the current is subtracting speed from it.

likewise, when the boat is going Downstream, because is going with the current, is really going faster at " b + c ".

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&\stackrel{km}{distance}&\stackrel{kmh}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
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Downstream&651&b+c&7
\end{array}
\\\\\\
\begin{cases}
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651=(b+c)(7)\implies 93=b+c\\
----------------------\\
93=\boxed{61+c}+c
\end{cases}
\\\\\\
93=61+2c\implies 32=2c\implies \cfrac{32}{2}=c\implies 16=c

what is the speed of the boat?  well, 61 + c = b.
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