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Surface area of cylinders? Plz help!

A cylindrical vase has height 16 in. and radius 2 in. Find the exact surface area of the vase in terms of π. Suppose a second vase has double the radius, but the same surface area. What is the height of this vase?


Sagot :

the surface area of the first vase is 64 pi.  then the doubled vase has a height of 4 inches.