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trapecia [35]
3 years ago
7

If a cylinder’s radius and height are each shrunk down to a third of the original size, what would be the formula to find the mo

dified surface area?
Mathematics
1 answer:
zubka84 [21]3 years ago
3 0

We let

r1 = the original radius of the cylinder

r2 = the new radius of the cylinder

h1 = the original height of the cylinder

h2 = the new height of the cylinder

SA = surface are of the cylinder

 

the radius and the height are shrunk down to a third of their value therefore

 

r2 = r1/3

h2 = h1/3

 SA = 2(PI)r^2 + 2(PI)rh

SA = 2(PI)[(r1^2)/9] +2(PI)(r1/3)(h1/3)

 

Simplifying

SA = [2(PI)r]/9 * (r1 + h1)

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Answer:

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Plotting the points A, B and C on the graph paper and joint them to get the straight line BC as shown in graph sheet. This line is the required graph of the equation y - 2x = 4 .

(i) Plot the point (2, 8) on the graph paper. From the graph it is clear that the point (2, 8) lies on the line.

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(ii) Plot the point (4, 2) on the graph paper. You fin that (4, 2) does not lie on the line.

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Step-by-step explanation:

HOPE IT HELPS

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sergeinik [125]

Answer:

Step-by-step explanation:

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