Concept explainers
The radius of cylindrical popcorn tin is
To find: the surface area of the cylinder.
Answer to Problem 29P
Surface area of the cylinder is
Explanation of Solution
Given information: The radius of cylindrical popcorn tin is
Calculation:
Let r and h be the radius and height of the cylindrical popcorn tin respectively.
Sine height of the tin is three times the radius, therefore h=3r
The formula for the surface area of the cylinder is
Since, h=3r, therefore surface area of the tin is
Substitute the value
Now, use the identity,
Thus, surface area of the cylinder is
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