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OverLord2011 [107]
3 years ago
8

The heights of two similar cylinders are 3cm and 4cm respectively. The total area of the bigger cylinder is 400cm².Calculate the

total surface area of the smaller cyl​
Mathematics
1 answer:
shusha [124]3 years ago
8 0

Answer:

Step-by-step explanation:

Total surface area = 2πr(r+h)

If the total area of the bigger cylinder is 400cm² and radius is 4cm, then;

400=2(3.14)(r)(r+4)

400= 6.26r(r+4)

400=100.48 + 25.12h

299.52 = 25.12h

H = 299.52/25.12

H = 11.92cm

For the smaller cylinder

The height is calculated as;

H/h = R/r

11/92/

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Answer:

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Step-by-step explanation:

Consider the given information.

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The reserve and residual volumes of air that remains in the lungs occupy about 1990 mL which is the minimum air in the lungs.

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The horizontal stretch will be  b=\frac{2\pi}{4}=\frac{\pi}{2} as we know that period of y=\sin t is 2\pi and respiratory cycle for an average human takes about 4 seconds.

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