perhatikan gambar berikut!

L selimut = phi x d x t
                = 22/7 x 14 x 16
                = 44 x 16
                = 704 dm2

V = La x t
   = phi x r x r x t
   = 22/7 x 7 x 7 x 16
   = 22 x 7 x 16
   = 154 x 16
   = 2464 dm3

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