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DaniilM [7]
2 years ago
9

Suppose a rail tunnel is 18.2 mi longer than the longest road tunnel. Express the length of the longest rail tunnel in terms of

the length of the longest road tunnel. (Let L represent the length of the longest road tunnel.)
Mathematics
1 answer:
yarga [219]2 years ago
3 0

The length of the longest rail tunnel in terms of the length of the longest road tunnel is; (18.2 + L) miles

<h3>How to express length of a rail?</h3>

We are told that a rail tunnel is 18.2 miles longer than the longest road tunnel.

Now, we are told that L should represent the length of the longest road tunnel.

Now, since L represents the longest road tunnel and the rail tunnel is 18.2 miles longer than the longest road tunnel, then we can say that;

Length of rail tunnel = 18.2 + L

Thus, we conclude that length of the longest rail tunnel in terms of the length of the longest road tunnel is; (18.2 + L) miles

Read more about Finding length at; brainly.com/question/26218049

#SPJ1

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Convert 1 cal/(m^2 * sec * °C) into BTU/(ft^2 * hr * °F)
Crazy boy [7]

Answer:

1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

Step-by-step explanation:

To find : Convert 1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C} into \frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

Solution :

We convert units one by one,

1\text{ m}^2=10.7639\text{ ft}^2

1\text{ sec}=\frac{1}{3600}\text{ hour}

1\text{ cal}=0.003968\text{ BTU}

Converting temperature unit,

^\circ C\times \frac{9}{5}+32=^\circ F

1^\circ C\times \frac{9}{5}+32=33.8^\circ F

So, 1^\circ C=33.8^\circ F

Substitute all the values in the unit conversion,

1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=\frac{0.003968}{10.7639\times \frac{1}{3600}\times 33.8}\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=\frac{0.003968}{0.101061}\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

Therefore, The conversion of unit is 1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}

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Rational expressions are multiplied and divided the same way numeric fractions are.

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