Mathematics High School

Find
(1) The total surface area of a closed cylindrical petrol storage tank whose diameter
4.2 m. and height 4.5 m.
(i) How much steel sheet was actually used, if 1/12
of the steel was wasted in making
of the tank. (anewer quickly and steps in order )​

Answers

Answer 1

Answer:

The amount of steel used = 94.38 [tex]m^{2}[/tex]

Step-by-step explanation:

Height of the tank = 4.5 m.

Diameter of the tank = 4.2 m.

But,

radius = [tex]\frac{diameter}{2}[/tex]

           = [tex]\frac{4.2}{2}[/tex]

radius  = 2.1 m

Total surface area of a cylinder = 2[tex]\pi[/tex]rh + 2[tex]\pi[/tex][tex]r^{2}[/tex]

                                      = 2[tex]\pi[/tex]r(r + h)

                                      = 2 x [tex]\frac{22}{7}[/tex] x 2.1 (2.1 + 4.5)

                                      = 44 x 0.3 (6.6)

                                      = 87.12

Total surface area of a cylinder = 87.12 [tex]m^{2}[/tex]

Since [tex]\frac{1}{12}[/tex] of the steel was wasted, then;

[tex]\frac{1}{12}[/tex] x 87.12 = 7.26 [tex]m^{2}[/tex]

Actual area of steel sheet used = 87.12 + 7.26

                                                     = 94.38 [tex]m^{2}[/tex]

Thus, 94.38 [tex]m^{2}[/tex] of steel was used in making the tank.

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

Refer to the attached file

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Have a great day : )

Answer:

Hopefully u will satisfy with my answer..!!

I have a triangle with angles measuring 40, 40, and 100. Is this one a unique triangle, many triangles, or no triangle?

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Answer:

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Step-by-step explanation:

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PLEASE ANSWER THIS
imagine is above
Figure 3 shows the electronic structure of an atom.
Figure 3
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RON
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Answers

Answer:

huh looks simple....it's unreactive because it's already stable

Step-by-step explanation:

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Sara puts $4,000 into an investment yielding 5% annual simple interest; she left the money in for five years and 6 months. How much interest does Sara get at the end of those five years and 6 months?

Answers

Answer:  [tex]\$1100[/tex]

Step-by-step explanation:

Given

Principal amount is [tex]P=\$4000[/tex]

Rate of interest [tex]R=5\%[/tex]

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We know, Simple interest is

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Answers

Answer: -b - 9

Step-by-step explanation:

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Finally, add the 4 to the negative 13 to get (-b - 9)

Hope this helps.

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Answers

Answer:

x=4

Step-by-step explanation:

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Answers

Answer:

4.62 years

Step-by-step explanation:

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Answer:

c .  

Step-by-step explanation:

Answer:

sas maybe

Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Answers

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Answers

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Answers

Answer:

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Answers

Answer:

The correct answer is option D

Hope this helped you! If it did help please consider giving brainliest!

Please do not forget to give a thanks and leave a rating!

Answer:

the answer is D Have a great day

BRAINLIEST TO CORRECT ANSWER!!

Answers

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Answers

Answer:

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B is correct 12 for find the y-intercept of 2x-y=-6
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Answers

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Answer:

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Answers

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Answers

Answer:

-7x-4y+4y=-44+4y

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Step-by-step explanation:

How many 12 Feet 2 x 4 would be needed for Bottom Plates and Double Top Plates on a Building 25' x 50' ?

Answers

Your question has confusing details. So, I will rephrase as:

How many 2' x 4' would be needed for Bottom Plates and Double Top Plates on a Building 25' x 50' ?

Answer:

12.5 plates

Step-by-step explanation:

Given

Building dimension:

[tex]Length = 25ft[/tex]

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[tex]Width= 4ft[/tex]

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and

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For the width, we have:

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