Answers

2014-03-02T18:34:27+08:00
If 9.5 is the height and 4.2 is the radius
it's like this...
use the formula 2πr² + 2πrh
2π(4.2)² + 2π(4.2)(9.5)
110.8353888 + 250.6990938
361.53
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