Jawabanmu

2014-02-16T16:48:58+07:00
Keliling roda = 2 \pi r
                   = 2 x 3,14 x 0,28
                   = 1,7584
607,20/ 1,7584= 345 kali,,
2014-02-16T16:53:41+07:00
Jari2 = 28 Keliling = 22/7 x 56 = 176 cm = 1,76 m Roda berputar sebanyak = 607,20 / 1,76 = 345 kali