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616 = keliling alas × 14 cm
616 : 14 cm = 44 cm
keliling alas = keliling lingkaran = d
44 cm = 22/7 × d
44 cm × 7/22 = d
14 cm = d
r = 1/2 d
r = 7 cm
luas alas =
=22/7.
=154
luas sisi tabung terbuka = luas alas + luas selimut
=154 + 616 = 770 cm