Wednesday, May 7, 2014

Find the surface area of the cylinder if the volume = 588*pi and the height is 12.

We will determine the radius using the volume
formula.


==> V = r^2 * pi *
h


==> 588pi = r^2 * pi *
12


We will reduce
pi.


==> 588 = r^2 *
12


Now we will divide by
12.


==> r^2 = 588/12 =
49


==> r = 7


Now let us
calculate the surface area.


==> surface area =
2*area of the base + area of the sides.


==> area of
the base = r^2 * pi= 7^2*pi = 49pi


area of the side =
circumference * h = 2*pi*r *h = 2*7*pi*12 =
168pi.


==> surface area = 2* 49pi + 168pi= 98pi +
168pi = 266pi = 835.66



Then the
surface area of the cylinder is SA = 266pi = 835.66 square
units.

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