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Blizzard [7]
2 years ago
10

Work out the surface area of this cylinder. 12 cm radius 35 cm height

Mathematics
1 answer:
zaharov [31]2 years ago
4 0

Answer:

The surface area of this cylinder is 3545\frac{1}{7} cm²

Step-by-step explanation:

The formula of the surface area of the cylinder is

  • Surface area = later area + 2 base area, where
  • Lateral area = perimeter of the base × height of the cylinder

Let us use the rules above to solve the question

∵ The base of the cylinder is a circle

∵ The perimeter of the circle = 2 π r

∵ The radius of the cylinder is 12 cm

∴ r = 12

∴ The perimeter of the base = 2 (12) (π)

∴ The perimeter of the base = 24π cm

∵ The height of the cylinder is 35 cm

∴ h = 35 cm

→ By using the rule of the lateral area above

∵ The lateral area = 24π × 35

∵ π = \frac{22}{7}

∴ The lateral area = 24 × \frac{22}{7} × 35

∴ The lateral area = 2640 cm²

∵ The area of the circle = π r²

∴ The area of the base = \frac{22}{7} × (12)² = \frac{22}{7} (144) = 452\frac{4}{7} cm²

→ By using the rule of the surface area above

∴ The surface area = 2640 + 2(452\frac{4}{7}) = 3545\frac{1}{7} cm²

∴ The surface area of this cylinder is 3545\frac{1}{7} cm²

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Let's calculate first the side of the square. It is equal to 2r = 2*8=16 cm

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Hope that helps.
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3 years ago
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Using a t-distribution calculator and finding the p-value, the correct option regarding the conclusion is given by:

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<h3>What is the relation between the p-value and the conclusion?</h3>

It also involves the significance level, as follows.

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In this problem, a t-distribution calculator for a right-tailed  with <em>t = 2.15 and 25 - 1 = 24 df</em> is used to find a p-value of 0.02.

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3 years ago
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Answer:

A, B & D

Step-by-step explanation:

Because if you subtract one of the constants from both sides then you should only have equal variables. In other words, both sides have to be identical in this situation.

33x-33= 33x + 25

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4 0
3 years ago
Can someone help me answer this please
Citrus2011 [14]

Answer:

N = 3/8

Step-by-step explanation:

let the number be N

let's express the word sentence as a mathematical expression:

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= "N" multiplied by 2/5

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N = 3/8

6 0
2 years ago
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