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a. kell bangun
= kell lingk. + (20x2)
= (22/7 x 14) + (20x2)
= 44 + 40
= 84 cm
b. luas bangun
= luas persegi panjang + luas lingkaran
= (p x l) + (phi x r x r)
= (20 x 14) + (22/7 x 7 x 7)
= 280 + 154
= 434 cm kubik
= 44 + 40
= 84 cm
*= L P.panjang + L.Ling
= (pxl)+(phixrxr)
=(20x14)+(22/7)
=280+154
=434cm kb