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3 years ago

14. Find the height of a cylinder if the surface area is 408.41 square inches and the radius is 5

Mathematics

1 answer:

weeeeeb [17]3 years ago

8 0

Answer:

Height is 8.0in

Step-by-step explanation:

Surface Area of a cylinder = 2πr(r+h)

r is the radius

h is the height of the cylinder

Given surface area = 408.41in²

radius = 5in

h = ?

Substituting the given value into the formula

408.41 = 2π(5)(5+h)

408.41 = 50π + 10πh

408.41 = 50(3.14)+10(3.14)h

408.41 = 157+31.4h

408.41-157 = 31.4h

251.41 = 31.4h

h = 251.41/31.4

h = 8.0in

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3 years ago

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Sergeu [11.5K]

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Step-by-step explanation:

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$required \: scale \\ = \frac{12 \frac{1}{2} }{1 \frac{9}{16} } \\ \\ = \frac{ \frac{25}{2} }{ \frac{25}{16} } = \frac{25}{2} \times \frac{16}{25} = \frac{1}{2} \times \frac{16}{1} \\ \\ = 8 \: : \: 1$

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3 years ago