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Jawaban paling cerdas!
2014-02-15T08:20:09+07:00
539 liter = 539 dm³
diameter 70 cm = 7dm
jari2nya 3,5 dm

volume tabung=πr²t
539= 22/7 x 3,5 x 3,5 x t
539= 22/2 x 3,5 x t
539= 38,5 t
t=14

luas tabung tanpa tutup
= πr²+πdt
= π(r²+dt)
=22/7 (3,5² + 7x14)
=22/7 x 110,25
= 346,5