Jawabanmu

2014-05-27T21:14:05+07:00
K = 62800 cm / 500
K = 125.6 cm
125.6 cm = 3.14 x d
d = 125.6 / 3.14
d = 40cm :)
2014-05-27T21:14:08+07:00
628 m = 62800 cm
pl=ko.n
62800=ko.500
62800:500=ko
125,6=ko

125,6=3,14.d
125,6:3,14=d
40=d