volume tabung 785 liter dan jari jari alasnya 50 cm. luas tabung tanpa tutup adalah........cm²

vol tabung = pi x r kuadrat x t
785 liter = 3,14 x 50 x 50 x t
785 = 314 x 25 x t
785 = 7850t
t = 7850/785
t = 10

luas tabung tnp tutup = pi x r kuadrat + 2 pi r t
= 3,14 x 50 x 50 + 2 x 3,14 x 50 x 10
= 314 x 25 + 628 x 5
= 7850 + 3454
= 11304