Jawabanmu

2014-05-09T18:55:50+07:00
Keliling = 3,14*diameter = 62,8cm
diameter = 62,8 / 3,14 = 20cm
Luas persegi panjang = (20*6)*20 = 2.400cm^2
Luas 6 lingkaran = 6*3,14*10*10 = 1.884cm^2

Luas yg diarsir = 2.400-1.884 = 516cm^2