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4 years ago

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There are 10 students in a classroom, including the triplets Hugh,Stu, ans Lou. if 3 of 10 are randomly selected to give speeche

s, what is the probability that Hughs will be first ,Stu will be second, and Lou will be third?

1 answer:

Brrunno [24]4 years ago

7 0

P(Hugh) = 1/10
P(Stu) = 1/9
P(Lou) = 1/8

Required probability = 1/10 * 1/9 * 1/8 = 1/720

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The surface area of a cylinder is 432 pi yd2. The height of the cylinder is five times the radius. What is the diameter of the c

GrogVix [38]

Since the surface area of this cylinder is $432\pi \;yd^2$ , its diameter is equal to 12 yards.

<h3>How to calculate surface area.</h3>

Mathematically, the surface area (SA) of a cylinder is given by this formula:

$S.A = 2\pi rh + 2\pi r^2$

<u>Where:</u>

h is the height.

r is the radius.

<u>Given the following data:</u>

Surface area of cylinder = $432\pi \;yd^2$

Height = 5r.

Substituting the given parameters into the formula, we have;

$432\pi = 2\pi r(5r) + 2\pi r^2\\\\432\pi = 2\pi 5r^2 + 2\pi r^2\\\\216=5r^2+r^2\\\\216=6r^2\\\\r^2=36\\\\r=\sqrt{36}$

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Diamter = 2 x radius

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Diameter = 12 yards.

Read more on surface area here: brainly.com/question/21367171

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