A soup can that is a cylinder has a radius of 2x-1 and a height of 3x. What is the surface area of the soup can?
1 answer:
SA = ?
<span>r = 2x - 1 </span>
<span>h = 3x </span>
<span>Then, </span>
<span>SA = 2π(2x - 1)² + 2π(2x - 1)(3x) </span>
<span>==> 2π(4x² - 4x + 1) + 6πx(2x - 1) </span>
<span>==> 8πx² - 8πx + 2π + 12πx² - 6πx </span>
<span>==> 20πx² - 14πx + 2π units² </span>
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