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surface area of cylinder , diameter 16 , height 40

Algebra
Tutor: None Selected Time limit: 0 Hours

finding surface area

also in the form of pi an regular numbers

Apr 26th, 2015

Surface area is calculated by adding together the area of each of the sides.  The cylinder has 3 sides, two circular bases and 1 rectangle.

Area of cirlce = pi*(d/2)^2 = pi * (16/2)^2 = pi *8^2 = 64 pi

Area of rectangle = pi*d*h = pi* 16 * 40 = 640 pi

Surface area = 2* area of circle + area of rectangle

Surface area = 2 * 64 pi + 640 pi = 128 pi + 640 pi = 768 pi

Apr 26th, 2015

thank you very much may i ask 1 more question ?

Apr 26th, 2015

If it is a short one.

Apr 26th, 2015

volume of a sphere with radius of 36.

Apr 26th, 2015

Volume of a sphere is an equation that you will need to memorize.

Volume of a sphere =4 / 3 * pi * r^3

V = 4/3 * pi * 36^3

V = 4/3* 46656*pi

V = 62208 pi

Apr 26th, 2015

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