finding surface area
also in the form of pi an regular numbers
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
thank you very much may i ask 1 more question ?
If it is a short one.
volume of a sphere with radius of 36.
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
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