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I am Lyosha [343]
2 years ago
9

-The concrete sections of a highway are designed to be 25 m long. Sections are prepared at 10°C. What is the minimum space that

must be left between such sections, to avoid sagging, knowing that the asphalt reaches 50ºC?
Data: α=12 10-6 ºC-1
.
Mathematics
2 answers:
Sergeu [11.5K]2 years ago
6 0
Can send you some pics please please let me know if I need to get to
Vadim26 [7]2 years ago
4 0

Let <u>d = distance between two plates</u>, <u>L = length of a plate</u>, and assuming that the coefficient provided is that of linear expansion, the elongation of a section is<u> </u><u>∆L = Lα (T₂ - T₁) = 0, 012 m</u><u> </u>. Assuming that the elongation is shared equally to both sides of each section, when two sections are in contact, it is fulfilled

\pmb{\dfrac{d}{2}=\dfrac{\Delta L}{2 }\Rightarrow d=\Delta L=0,012 m= 1,2 cm} \\\\\\\boxed{\pmb{d=1,2 \ cm}}

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A shoe dealer purchased net Birr 8,000 worth of shoes from a shoe company.A Find the amount it is to pay the company including V
Yanka [14]

Answer:

A) Total amount to be paid = Birr 8,560

B) Amount of VAT liable to the dealer = Birr 520

Step-by-step explanation:

The tax on bought commodity and the tax on sold commodity isn't provided but in some places, these values are 7% and 9% respectively. So, these are the values that will be used for this question.

Note that these values vary from country to country and the value missing from this question will not change how the question is solved; the question will still be solved in a similar manner, only the parameters will vary.

A) The dealer bought Birr 8000 at 7% tax.

Total amount to be paid = cost price (1 + r%)

r = 7% = 0.07

Total amount to be paid = 8000 × 1.07 = Birr 8,560

B) To find the VAT, it is the difference between the tax paid when the good was bought and the tax put on it after it was sold.

Tax paid when the shoes were bought = 7% of cost price = 7% × 8,000 = Birr 560

Tax paid when the shoes were sold = 9% of selling price = 9% × 12,000 = Birr 1,080

VAT = tax recovered on sale - Tax paid on purchase

VAT = 1080 - 560 = Birr 520

Hope this Helps!!!

5 0
3 years ago
The legth of a rectangle is 15 inches less then twice its width, w. If the perimeter of the rectangle is 96 inches what is the l
KATRIN_1 [288]

Answer:

length of the rectangle=27"

Step-by-step explanation:

length be = l; width be = b

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perimeter= 2(l+b)

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3b-15 .=48

3b=48+15=63

b=21. Therefore l = (2 x 21)  - 15=42-15  =27"

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