Jawabanmu

2014-09-05T19:56:03+07:00
Luas selimut = keliling alas × tinggi tabung
616 cm^{2} = keliling alas × 14 cm
616 cm^{2} : 14 cm = 44 cm


keliling alas = keliling lingkaran =  \pi d
44 cm = 22/7 × d
44 cm × 7/22 = d
14 cm = d

r = 1/2 d
r = 7 cm

luas alas =  \pi  r^{2}
=22/7. 7^{2}
=154  cm^{2}

luas sisi tabung terbuka = luas alas + luas selimut
=154 + 616 = 770 cm