SOLUTION: A 1½ oz. bottle of roll-on deodorant has a height of 4 in. and a radius of ¾ in. Find the surface area of the bottle if the bottle is shaped like a silo. Use 3.14 for π.
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Question 521569: A 1½ oz. bottle of roll-on deodorant has a height of 4 in. and a radius of ¾ in. Find the surface area of the bottle if the bottle is shaped like a silo. Use 3.14 for π.
Altitude of a launched object. The altitude of an object, in meters, is given by the polynomial
h + vt − 4.9t^2
where h is the height, in meters, at which the launch occurs, v is the initial upward speed (or velocity), in meters per second, and t is the number of seconds for which the object is airborne.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The lateral surface area of the cylinder part is given by 
where 
is the radius of the cylinder and 
is the height of the cylinder part. Remember that the overall height includes the upper hemisphere which has a radius of 
inch, so that much must be subtracted from the overall height of 4 inches to find the height of the cylinder part.
The surface area of a sphere is given by 
, so the surface area of hemisphere has to be half of that or
The surface area of the bottom is nothing more than the area of a circle with radius
So, the total surface area has to be:
\ =\ \pi{r}\left(3r\ +\ 2h\right))
Just plug in the numbers snd do the arithmetic.
John
My calculator said it, I believe it, that settles it
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