Philip P. answered • 12/09/17

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Volume = (4/3)·pi·r

^{3}20 = (4/3)·pi·r

^{3}15/pi = r

^{3}(15/pi)

^{1/3}= r**Surface Area = pi·r**

^{2}+ 2pi·r·h- r = (15/pi)
^{1/3} - h = 5 m

Plug in the numbers and compute the answer on your calculator.