Jawabanmu

2014-09-03T18:33:52+07:00
1 liter = 1000cm3, phi = 22/7
jadi, 7,7 liter = 7,7 × 1000 = 7700 cm3
volum tabung =3.14r^2t
7700 = 22/7 × r^2 × 50
r^2 = 7700 / (22/7 × 50)
r^2 = 49
r = √49
r = 7
jadi jari2 tangki adalah 7 cm